永和工芸 Product Lineup

[Cause of Occurrence] In parts made from aluminum die casting or zinc die casting, appearance abnormalities such as orange peel or gloss defects may occur after painting. On-site, it is often thought that there are issues with the air pressure of the spray gun or the amount of coating applied. [Truth] The root of the problem lies in the variation of the "surface roughness" of the material itself. If the roughness from casting defects or shot blasting is uneven, the paint will be absorbed into the recesses, preventing the formation of a uniform film thickness (leveling). This is directly linked to causing dripping defects. [Improvement Measures] In addition to proper surface treatment with the appropriate grit of abrasive material, utilizing the sealing effect of a primer (undercoat) can help maintain a smooth surface. Best practice materials for surface treatment that addresses the surface roughness of die-cast products can be downloaded and referenced here. [Summary] Proper polishing and primer treatment to uniformly adjust the surface roughness of the material are essential for a beautiful appearance finish. Eiwa Kogei Co., Ltd. solves appearance abnormalities with pre-treatment and painting techniques tailored to the characteristics of die-cast products.

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[Cause of Occurrence] In metal painting, attention tends to focus on "how to paint," but in reality, most of the quality is determined by the time the painting process begins. Neglecting pre-treatment can lead to simultaneous occurrences of various defects such as poor adhesion, rust, and blisters. [Truth] Even using excellent paint is meaningless without the "anchor effect" that firmly bonds the metal material and the paint film. To meet the harsh durability required for automotive parts, it is essential to form a uniform and dense zinc phosphate film (conversion coating) on the surface of the material. [Improvement Measures] It is important to regularly measure the total acidity, free acidity, and concentration of accelerators in the conversion treatment solution twice a day to control the size of the film crystals. A daily management manual for pre-treatment solutions that can be used immediately on-site can be downloaded from the button below. [Summary] The true foundation of painting is pre-treatment, and precise film management is the lifeline of high-durability automotive part painting. Eiwa Kogei Co., Ltd. thoroughly manages pre-treatments, including zinc phosphate coating, to achieve high-quality painting.

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[Cause of Occurrence] "Blisters," which appear as water blisters on the paint film of automotive suspension parts and other components months after delivery, are defects that are extremely difficult to address with complaints. They have the troublesome characteristic of being hard to detect during pre-shipment inspections in the factory. [Truth] The true nature of blisters is "invisible corrosion" that progresses beneath the paint film. If salt and impurities remain on the metal surface due to insufficient rinsing in the pretreatment process, moisture from the atmosphere can penetrate and absorb water through osmotic pressure, pushing the paint film up from the inside. This can also manifest as a precursor to other abnormalities, such as color unevenness. [Improvement Measures] The use of pure water (conductivity of 10 microsiemens/cm or less) in the final rinsing process and thorough drying after rinsing are the solutions. A checklist that establishes quality standards for the rinsing process can be downloaded from this link to assist in quality assurance. [Summary] Blisters that occur with a time lag can only be prevented by thorough removal of impurities in the final rinsing of the pretreatment process. Eiwa Kogei Co., Ltd. provides consistent support from pretreatment to painting, ensuring high quality assurance.

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[Cause of Occurrence] Pinholes (bubbles) that occur on the painted surfaces of automotive parts are defects that significantly impair appearance quality. On-site, the mixing ratio of thinner and the viscosity of the paint are often suspected, leading to repeated adjustments in the formulation. [Truth] In reality, many pinholes are caused by air trapped in oil or moisture that remains in the gaps of the material, or by air trapped in the "voids" characteristic of aluminum die casting, which expands during curing and breaks through the paint film. This phenomenon is often mistakenly identified as foreign matter contamination. [Improvement Measures] To prevent this, it is essential to extend the setting time by 3 to 5 minutes longer than usual to allow volatile gases to escape slowly, and complete drying during pretreatment is crucial. For temperature management guidelines aimed at fundamentally eliminating pinholes, please download our free materials for more information. [Summary] Addressing pinholes is not only about adjusting the paint but also about controlling the discharge of air and moisture trapped in the material. Eiwa Kogei Co., Ltd. will solve all your concerns related to metal painting, including poor adhesion of zinc die casting and aluminum die casting.

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In metal baking paint, thinners are selected according to the season and temperature. Even with the same paint, the evaporation rate of the thinner changes with temperature, so using the same type year-round does not ensure stable quality. In summer, if evaporation is too fast, it can easily lead to skin roughness, uneven gloss, and pinholes. On the other hand, in winter, slow drying can cause runs and dust adhesion. Choosing the right thinner is important not only for drying time but also for adjusting the speed at which the paint film is formed cleanly.

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When there is little thinner in metal baked paint, the viscosity of the paint increases, and it cannot be atomized evenly from the spray gun. As a result, the paint adheres to the product in large particles, making it prone to orange peel and rough texture. Additionally, because the paint does not spread sufficiently, it can also cause variations in film thickness and uneven gloss. Reducing the amount of thinner does not make it more durable. Measurement with a viscosity cup and management based on the specified dilution ratio are necessary for quality stability.

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If too much thinner is added to metal baked paint, the resin components in the paint become diluted, leading to insufficient film thickness and reduced durability. Even if it feels easier to apply, there is a possibility that the performance of the paint film is compromised. Additionally, making the paint flow more easily can lead to drips, hindering the formation of a uniform paint film. Furthermore, if the volatilization conditions are not suitable, it can result in pinholes, uneven gloss, and paint peeling. Adhering to the dilution ratio specified by the paint manufacturer is fundamental to ensuring quality stability.

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In metal baking paint, paint and thinner are used together, but their roles are significantly different. The paint is the material that provides color, gloss, rust resistance, and durability. On the other hand, the thinner is an auxiliary material that adjusts the viscosity of the paint and allows for even spraying. If the paint is sprayed as is, its high viscosity makes it difficult to create a fine mist, which prevents the formation of a beautiful paint film. Understanding the roles of paint, thinner, and hardener, and adhering to the appropriate mixing ratio is essential for maintaining quality.

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The thinner used in metal baking paint is not just a material for diluting the paint. It plays an important role in adjusting the viscosity of the paint and creating a state where it can be sprayed evenly from a spray gun. If the thinner is not used properly, the paint may not atomize well, leading to variations in film thickness and poor appearance. Additionally, if the evaporation rate is not suitable, it can also cause pinholes, blisters, and poor adhesion. Understanding the role of thinner is the first step towards stabilizing quality.

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Poor adhesion in metal baked coatings can lead not only to paint peeling but also to the reoccurrence of blisters and rust, as well as a decrease in durability. Many of the causes lie not in the painting process but in the pretreatment process. Residual oil due to insufficient degreasing, inadequate formation of chemical conversion coatings, and moisture retention due to insufficient drying can prevent the coating film from adhering sufficiently to the metal surface. Furthermore, the necessary pretreatment varies by material, such as aluminum die-cast and zinc-coated steel sheets. Standardizing pretreatment conditions and numerical management are key to improving quality.

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In metal baking paint, the film thickness greatly affects product quality. If it is too thin, corrosion resistance and durability decrease, and if it is too thick, it can cause runs, dimensional defects, and assembly issues. Film thickness issues are influenced not only by the discharge amount and painting speed of the gun but also by paint viscosity, thinner dilution ratio, spraying distance, and product shape. In complex shapes, the film thickness tends to vary at corners and bag-like areas. Measuring with a film thickness gauge, managing viscosity, and standardizing discharge conditions are shortcuts to stabilizing quality.

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Blisters that occur in metal baked coatings are defects where the surface of the coating swells like a water bubble. Even if there are no issues immediately after painting, they can appear months to years after delivery. The main causes are moisture or foreign substances that could not be removed during pretreatment, and reduced adhesion due to insufficient chemical treatment. When moisture or oxygen penetrates between the coating and the metal, internal corrosion progresses, and the swelling becomes visible due to osmotic pressure. To enhance long-term durability, it is important to manage the entire process, including degreasing, washing, chemical treatment, and drying.

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Pinholes that occur in metal baked coatings are a typical defect where small holes appear on the surface of the paint film. The causes can be not only related to the painting process but also hidden within the gases inside the material or in the pretreatment process. In aluminum die-casting and castings, fine gases remaining from the manufacturing process can expand during baking and break through the paint film. Additionally, the residual oil and moisture can similarly lead to pinholes. Gas release through preheating, degreasing, and reviewing drying conditions are key to stabilizing quality.

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The peeling of paint that occurs during metal baking paint processes is not solely caused by the paint or the baking temperature. If the pre-treatment processes such as degreasing, washing, chemical treatment, and drying are insufficient, the adhesion between the paint film and the metal surface decreases. Particularly, if baking is performed while cutting oil or rust preventive oil remains, the oil will volatilize at temperatures around 180 to 200 degrees, creating tiny gaps between the paint film and the material. As a result, peeling occurs due to vibrations and impacts during use. To improve quality, it is important to manage pre-treatment conditions numerically before changing the paint.

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Filling holes is a defect where bolt holes, positioning holes, drainage holes, etc., are blocked by paint. This issue is discovered at the customer site when bolts cannot pass through, parts do not fit into jigs, or water cannot drain. Particularly, if just one drainage hole is blocked, moisture can remain inside, leading to rust reoccurrence or blistering. The causes include excessive film thickness, spray direction, part orientation, jig setup, and paint pooling before drying. Initially, we check the position of functional holes, the extent of blockage, surrounding drips, and reproducibility with the same parts. The countermeasures involve identifying functional holes on the drawings and confirming them at three stages: before painting, after painting, and before shipping. Since drips and thick films are likely to occur around the holes, we confirm the passage not only visually but also using pins or gauges as necessary. It is important to make functional holes a dedicated focus for verification. Please utilize painting management documents for confirmation. Holes are parts that are directly related to functionality rather than appearance. Creating an important hole list and making it an independent inspection item will help prevent recurrence.

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Masking defects are failures where paint adheres to areas that should not be painted. Areas such as screw parts, contact points, fitting parts, grounding parts, and drainage holes can cause the customer's assembly process to stop even with just one instance of adhesion. Even if it appears as a small overflow visually, it directly leads to functional defects such as screws not fitting, lack of electrical conductivity, or parts not fitting together. Initially, we check the drawing instructions for unpainted areas, the position of masking materials, any lifting, and the number of times they can be reused. The countermeasures involve standardizing four points: masking range, materials used, application procedures, and inspection methods. Additionally, separating pre-work checks from post-painting checks makes it easier to identify forgotten areas, lifting, and misalignment. When reusing masking materials, it is also necessary to check for deterioration and loss of adhesive strength. Please utilize check materials for managing unpainted areas. Since issues with unpainted areas often arise in later processes, having a system to verify them as functional parts before shipment is effective.

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Poor film thickness is a complaint factor that is often overlooked in visual inspections. A coating that is too thin reduces corrosion resistance, while a coating that is too thick can lead to assembly issues at screw parts, fitting parts, and around holes. In other words, film thickness is a management item that affects rust, appearance, and dimensions. Particularly in automotive parts, even a slight difference in thickness after painting can impact assembly and operation. Initially, we check for deviations from the standard values, measurement locations, production lots, and part shapes. The countermeasures involve determining measurement locations, frequency, standard values, and recording methods, as well as understanding where paint adheres easily for each part shape. If the measurement locations change every time within a lot, trends become difficult to see. By fixing the measurement points and comparing them with the production lot, it becomes easier to identify the causes. Managing film thickness also helps prevent dripping, color unevenness, and hole filling. Please utilize check materials for film thickness verification. It is more important to consistently measure the same location than to measure itself. Comparable records will serve as materials for cause investigation.

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Dripping defects are visual defects where the paint flows and leaves streaks. At customer sites, this can become an issue not only in terms of appearance but also as dimensional defects around holes and fitting areas. The cause is not solely the way the operator applies the paint. When three conditions—film thickness, viscosity, and component orientation—overlap, the paint tends to accumulate in one spot. Areas such as corners, downward surfaces, and around holes are particularly prone to dripping. Initially, we check the location of the drips, the direction of painting, how the jig is applied, and the drying time. Countermeasures include determining the discharge amount, gun distance, viscosity, jig orientation, and holding time before drying for each component. By documenting the locations of occurrence with photos or records, we can reflect on which shapes are prone to dripping in future productions. Reducing drips also helps prevent issues like hole filling and film thickness defects. Please utilize verification materials for reviewing painting conditions. Instead of stopping at operator training, reflecting the prone positions for dripping in standard documents for each component will make it easier to prevent recurrence in the next lot.

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Color variations and differences between lots can easily lead to complaints when compared by customers. The cause is not only the color of the paint. Slight deviations in four factors—paint stirring, dilution ratio, film thickness, and curing conditions—can change the appearance even with the same color number. Areas with thinner film thickness have reduced rust resistance, while thicker areas can lead to runs or poor drying, making color variations a sign of quality inconsistency. Initially, we check the differences from the standard sample, the lot in question, the orientation of the painted surface, and the film thickness measurements. The countermeasures involve standardizing stirring time, dilution conditions, measurement locations, and curing temperature, as well as keeping records for each lot. Additionally, using standard samples can reduce judgment discrepancies among workers. Addressing color variations not only improves appearance but also helps prevent film thickness issues and runs. Please utilize process verification materials for reviewing condition management. Relying on sensory judgment for color can lead to recurrence. It is important to use numerical records alongside standard samples and share the criteria for pass/fail on-site.

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The defects on the painted surface are easily found during the customer's visual inspection and can lead to sorting and repainting issues. If the cause is narrowed down solely to the painting booth, it may not be possible to prevent recurrence. The sources that need to be checked are the booth, jigs, work clothing, and transportation routes. Even a single particle of dust can enter under the paint film and create a bump, leading to unstable film thickness in the surrounding area. Additionally, moisture can enter from around the foreign object, potentially leading to rust or peeling. Initially, we check the size of the bump, the surface where it occurred, the location of occurrence, and the reproducibility with the same jig. Countermeasures include determining the cleaning frequency, the cleaning cycle for jigs, management of work clothing, and the arrangement of parts. By recording the production lot, occurrence location, and number of occurrences, it becomes easier to narrow down which process the contamination occurred in. Measures against foreign objects not only depend on equipment but also show differences in daily site management. Please utilize the painting process confirmation materials for inspections. By not only strengthening cleaning but also categorizing where contamination occurred into the four sources, unnecessary measures can be reduced.

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Blisters are troublesome because defects that were not visible at the time of shipment can appear later. A few weeks or a month after delivery, the paint film may swell, leading to complaints from customers. The main causes are three factors: moisture, oil, and rust particles remaining in the substrate. When moisture or foreign substances remain under the paint film, they expand over time, pushing up the paint film. Particularly, edges, welds, and bag-shaped parts tend to retain moisture, making it difficult to detect initial abnormalities through visual inspection alone. In the initial response, we check the diameter of the swelling, the number of occurrences, and the condition of the substrate after removing the paint film. Countermeasures include confirming drying after pretreatment, managing storage time before painting, checking curing conditions, and verifying the film thickness at the edges. Since blisters are also related to rust recurrence and peeling, not viewing swelling in isolation contributes to preventing recurrence. Please utilize pretreatment confirmation materials for investigation. By not just crushing the blisters but also checking the condition beneath the paint film, we can achieve permanent measures rather than mere cosmetic fixes.

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A pinhole may appear to be a small hole, but it is a significant defect that can lead to appearance issues, repainting, and sorting work for our clients. The factors to check are three: oil, moisture, and air. If oil remains on the surface of the material, if moisture does not fully dry after cleaning, or if air is trapped during spraying, any of these can cause gas to escape during curing, appearing as holes on the surface of the coating. Even a single hole can serve as an entry point for moisture and oxygen, potentially leading to rust or blisters. Initially, it is important to check the number of holes, the surfaces where they occur, and the incidence rate within the same lot to distinguish whether they are due to voids in the material or residues from the process. The countermeasures involve recording the temperature and concentration of the degreasing solution, drying time, spraying conditions, and the condition of the material for each process. It is crucial to manage pinholes not just as an appearance issue but as a weakness in corrosion resistance. Please utilize the painting defect check materials for organizing the causes. The countermeasures will differ depending on whether the holes are material-related or process-related. It is important to examine the actual items alongside the process records.

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Claims of rust reoccurrence may be discovered not immediately after delivery, but during storage or before assembly checks. The areas that require particular attention are the ends, around holes, and weld joints. Even if the surface is covered with paint, if red rust, scale, or moisture remains in the substrate, corrosion will progress beneath the paint film. Even a single thin film area can become an entry point for moisture, leading to red rust, blistering, and peeling. Initially, it is important to check the location of rust occurrence, the number of days in storage, the packaging condition, and the variation in film thickness. For permanent measures, it is crucial to connect the five processes of rust removal, degreasing, drying, film thickness confirmation, and pre-packaging checks as one rust prevention management system, rather than viewing them separately. By not attributing the cause solely to the customer's storage conditions and documenting the substrate condition before painting and key area checks before shipment, it becomes easier to reduce recurrence claims. Please utilize confirmation materials for reviewing rust prevention management. Keeping photos of red rust, storage duration, and packaging conditions will make it easier to determine whether to focus on the painting process or the storage environment.

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When contacted by a client regarding "peeling of the paint film during assembly," it is important to confirm the three processes of degreasing, cleaning, and drying before hastily changing the paint. If even a small amount of press oil or cutting oil remains, the oil will volatilize during curing, creating a layer that does not adhere between the substrate and the paint film. Even if the appearance at the time of shipment is good, peeling may become apparent due to the loads from fastening, transportation, and vibration. In the initial response, it is essential to check the production lot, the location of the peeling, and whether the substrate is exposed, and to verify the condition of the pretreatment solution, water drainage after cleaning, drying time, film thickness, and curing conditions against records. Furthermore, to prevent recurrence, it is effective to narrow down the verification items to about five and incorporate them into daily inspections, rather than relying on the operator's intuition. Peeling, rust, and blisters are linked to the same abnormalities in the preceding processes, so it is crucial to check the entire process. Please utilize check materials for confirming measures against painting defects. In physical inspections, documenting the differences with good products through photographs and recording the occurrence location on drawings will make it easier to prioritize countermeasures.

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Hole filling is a defect where bolt holes, drainage holes, positioning holes, etc., are blocked by paint. This issue becomes apparent to customers as problems such as bolts not passing through, not fitting into jigs, or water not draining. Causes include excessive film thickness, painting direction, component posture, jig setup, and paint pooling before drying. It is important to clearly define critical holes on the drawings and manage jig posture, spraying direction, film thickness, and post-paint inspection.

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Masking defects are failures where paint adheres to areas that should not be painted. In automotive parts, issues are likely to occur at screw areas, contact points, fitting parts, grounding areas, and drainage holes, and they may be discovered during the assembly process at the customer's site. To prevent misalignment of the masking position, peeling, deterioration of the masking material, and differences in judgment among workers, it is necessary to standardize the range of non-painted areas, the application procedure, and the inspection methods.

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Poor film thickness can lead to complaints in both cases of the coating being too thin or too thick. A thin film lacks corrosion resistance and durability, while a thick film can cause issues such as filling holes, dripping, poor fitting, and problems with threaded areas. In automotive parts, the coating also affects dimensions, so it is important to clarify the measurement locations, measurement frequency, and recording methods, as well as to manage how the paint adheres for each part shape.

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The defect is an appearance issue where the paint flows on the coated surface, creating streaks. At the customer’s site, not only the appearance but also the dimensions and assembly can be problematic. The causes include excessive spraying, reduced viscosity, gun distance, posture before drying, and paint pooling due to the shape of the parts. Preventing recurrence can be achieved not only by the skill of the operator but also by standardizing the film thickness criteria, discharge amount, jig posture, and holding time.

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Complaints about color differences between lots, even with the same color number, or partial color unevenness are directly related to the appearance quality of automotive parts. The causes include insufficient mixing of the paint, variations in dilution rates, differences in film thickness, painting distance, curing temperature, and drying time. Color unevenness can also be a sign of unstable film thickness or poor curing, so it is important to standardize paint conditions, film thickness measurements, and curing conditions.

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If there are blemishes or dirt on the painted surface, it may result in a defective judgment during the customer's visual inspection. The causes of foreign matter contamination are varied, including dust in the painting booth, fibers from work clothes, dirt on jigs, adhesion during transport, and foreign matter in the paint. The areas with foreign matter may have thinner paint layers, which can lead to rust or peeling. Cleaning, air management, jig cleaning, and checking the transport route are fundamental measures to address this issue.

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Blistering is a defect where the coating film swells, which may not be visible at the time of shipment but can be discovered by customers weeks or months later. The causes include residual moisture, oil, corrosion products in the substrate, instability of chemical treatment, and insufficient adhesion. Since corrosion and expansion progress beneath the coating film, it cannot be completely prevented by visual inspection alone. It is important to review the drying confirmation after pretreatment, rust removal, curing conditions, and storage time management.

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A pinhole is a surface defect characterized by the occurrence of small holes in the paint film. If discovered during the customer's visual inspection, sorting and repainting may be necessary. Causes include oil and moisture on the material surface, air entrapment, voids, paint viscosity, and unstable drying conditions. Even small holes can lead to reduced rust resistance, blistering, and the recurrence of rust, so it is important to check the degreasing, drying, and spraying conditions.

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If red rust occurs after delivery or during storage, it can lead to concerns about rust prevention quality for customers. Rust reoccurrence can be caused by remaining rust, scale, oil, moisture, and thin film on the material. Particularly, edges, areas around holes, and welds are places where corrosion factors are likely to remain. Reviewing the entire process, including substrate confirmation before painting, rust removal, degreasing, chemical treatment, film thickness management, and packaging conditions, is effective in preventing reoccurrence.

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When paint peeling occurs during the assembly of automotive parts, it leads to significant complaints from customers due to poor adhesion. The causes can lie not only in the paint itself but also in insufficient degreasing, residual oil, instability of the chemical conversion coating, and inadequate surface roughness, which may be hidden in the pretreatment process. Even if the parts appear to be good during visual inspection, they can delaminate under the stress of fastening and transportation, so it is important to review degreasing, cleaning, drying, and film thickness verification at each stage of the process.

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In blister prevention, it is important to check not only the paint and curing conditions but also the chemical treatment process. If the chemical film is not sufficiently formed, the adhesion between the coating and the material decreases, making it easier for moisture and oxygen to penetrate. As a result, corrosion progresses inside the coating, leading to blistering and peeling. Since the chemical film is difficult to see, managing the concentration of the treatment solution and the treatment time is key to ensuring quality stability.

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Blisters may not appear immediately after painting, but can occur months later. If there is slight moisture or foreign matter left inside the paint film, and if there is insufficient chemical treatment or degreasing, adhesion can decrease, allowing moisture and oxygen to penetrate and cause corrosion. As a result, this manifests over time as blisters on the surface. This is not a sudden defect, but rather a manifestation of issues that began before painting, indicating that a review of the entire pretreatment process is necessary.

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Blistering is a defect where the surface of the coating swells, which can lead to peeling or the recurrence of rust over time. The main causes are moisture or foreign substances remaining inside the coating. If moisture is left due to insufficient drying or inadequate chemical treatment, it can combine with moisture that has entered from the outside, creating pressure within the coating. Since the cause is not easily identifiable by just looking at the surface, it is important to check the pretreatment process and drying conditions.

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Insufficient drying after cleaning is a commonly overlooked cause of pinhole defects. In parts with complex shapes or bag holes, moisture tends to remain, and at baking temperatures around 180 degrees, it can rapidly evaporate and break through the coating. Residual moisture can lead not only to pinholes but also to blisters, adhesion failures, and the recurrence of rust. In environments where humidity exceeds 70 percent, managing drying time and air blow conditions is crucial.

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If pinholes do not decrease, the cause may lie in the degreasing process rather than the paint or film thickness. Cutting oils and press oils are difficult to confirm visually and can volatilize during the baking process, creating bubbles within the paint film. Residual oil not only leads to pinholes but also serves as an entry point for complex defects such as poor adhesion, blisters, and paint peeling. Managing the temperature, concentration, and replacement timing of the degreasing solution contributes to quality stability.

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A pinhole is a defect that occurs when small holes appear on the surface of a coating. In die casting and casting, it occurs when gas trapped inside the material expands during baking and breaks through the coating. When residual gas loses its escape route at around 180 degrees Celsius, it can lead not only to appearance defects but also to a decrease in rust prevention performance. The presence of oil and moisture can also cause similar issues, so reviewing preheating and drying conditions is effective.

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Aluminum products are lightweight and have excellent corrosion resistance, but they are made of a material that has a smooth surface, making it difficult for coatings to adhere. If the surface roughness is insufficient, adhesion strength may decrease, leading to peeling or chipping after a few months. It is important to create an appropriate roughness through blasting or chemical treatment to increase the contact area with the coating. Before changing the paint, it is necessary to confirm the pre-processes, including degreasing, chemical treatment, and roughness management.

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If paint peeling recurs, simply reviewing the baking temperature may not lead to improvement. Even if conditions such as 180 degrees for 20 minutes are followed, insufficient degreasing or poor chemical treatment can reduce adhesion. Abnormalities in previous processes may surface months later as peeling, blistering, or rust reoccurrence. It is necessary to confirm the entire process, including degreasing, drying, and chemical treatment, rather than just raising the temperature as a countermeasure.

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Paint peeling is a typical defect caused by issues in the pre-painting process, such as insufficient degreasing or inadequate chemical treatment. If press oil or cutting oil remains during curing, the oil will volatilize at around 180 degrees, creating tiny spaces between the paint film and the substrate. As a result, peeling occurs due to vibrations or impacts. Even if the surface looks clean, there may still be residual oil or oxidation films, making it important to manage the numerical values of pre-treatment conditions.

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In the telecommunications equipment industry, particularly for components like antenna bases, the adhesion of paint is crucial for maintaining product reliability. Residual release agents and processing oils on the material surface can hinder paint adhesion and lead to coating delamination. Even trace amounts of oil, which are difficult to detect visually, can result in reduced adhesion after painting and potential peeling weeks later. Additionally, insufficient degreasing can also lead to the occurrence of blisters and pinholes. When the degreasing process is shortened to improve productivity, it is not uncommon for the costs of re-coating or handling complaints to increase as a result. The first step in addressing poor adhesion issues is to standardize the degreasing process and review management conditions. Our technology addresses these challenges and provides stable painting quality. 【Application Scenarios】 - Painting of telecommunications equipment and antenna bases - Painting of components that are prone to adhesion of release agents and processing oils - Products requiring long-term coating reliability 【Benefits of Implementation】 - Reduction in complaints due to poor paint adhesion - Decrease in re-coating costs - Improvement in product reliability

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In the painting of OA equipment enclosures, the adhesion of the paint film is emphasized to ensure the product's appearance quality and durability. Particularly in the case of aluminum die-cast materials, poor adhesion of the paint can easily occur due to the adhesion of release agents or processing oils, which can lead to peeling or deterioration of appearance. Even trace amounts of oil, which are difficult to detect visually, can cause issues such as peeling of the paint film, blisters during the curing process, and pinholes. When the degreasing process is shortened to improve productivity, it is not uncommon for the costs of re-coating or handling complaints to increase as a result. As the first step in addressing adhesion issues, standardizing the degreasing process and reviewing management conditions are essential. 【Usage Scenarios】 - Painting of aluminum die-cast OA equipment enclosures - Products requiring appearance quality and durability - Cases facing challenges in managing the degreasing process 【Benefits of Implementation】 - Reduced risk of peeling due to improved paint film adhesion - Suppression of painting defects such as blisters and pinholes - Reduction in costs for re-coating and handling complaints - Enhanced appearance quality and reliability of the product

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