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Pre-paint treatment Product List

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PPC service

PPC service

Because we have done the painting! We can meet all quality, performance, and budget requirements.

"PPC" refers to a service that means Peeling, Paint, and Cleaning. We offer proposals for pretreatment and paint stripping. In pretreatment, we perform zinc phosphate treatment in barrels, accommodating mass production of iron products in palm-sized units, ranging from 1,000 to 10,000 pieces. We contribute to addressing challenges such as searching for subcontractors due to the lack of in-house facilities. For stripping, we carry out chemical treatment with ultrasound and stripping solution, heating treatment with micro-heaters, and polishing treatment with blast equipment. This removes paint accumulated on in-house jigs, leading to cost reduction. Please feel free to contact us when you need our services. 【Processing Methods】 ■ Zinc phosphate treatment in barrels ■ Chemical treatment with ultrasound and stripping solution ■ Heating treatment with micro-heaters ■ Polishing treatment with blast equipment *For more details, please download the PDF or feel free to contact us.

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  • Surface treatment contract service
  • Pre-paint treatment

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The SUS coating was hindered by the "passivation film" from adhering properly.

The SUS coating was hindered by the "passivation film" from adhering properly.

Explanation of measures against poor adhesion and peeling due to the unique passive film of stainless steel.

Stainless steel has high corrosion resistance, but it is a material that is difficult for paint to adhere to. There are cases where the passive film on the surface repels the coating. Sandblasting or a special primer may be required. Pre-treatment specifically for stainless steel is important. We also provide detailed examples of improvements in publicly available materials.

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Why do blisters appear months later? The reason for invisible corrosion.

Why do blisters appear months later? The reason for invisible corrosion.

Parts that had no issues at the time of shipment are now blistering in the market. We will uncover the mystery of blisters that occur after a long period of time.

[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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How to prevent paint peeling? All about adhesion.

How to prevent paint peeling? All about adhesion.

Preprocessing is everything about adhesion.

This explains the key points for improving poor adhesion, insufficient pre-treatment, degreasing, and drying conditions that can cause paint to peel. The reasons for peeling occurring some time after painting are not only due to insufficient pre-treatment but also due to trace amounts of moisture and oxidation films. Adhesion can vary significantly depending on humidity and the condition of the materials. It is important to understand the reasons why results differ even with the same process and to review the process accordingly. Poor painting cannot be improved with vague measures. Our company has published case study materials on improvements. Please take a look.

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Dop plating was causing delamination due to "surface reactions."

Dop plating was causing delamination due to "surface reactions."

Explaining paint peeling due to surface reactions of molten zinc coating and countermeasures.

Hot-dip galvanized steel is a material that is difficult for paint to adhere to. It has a very smooth surface, making it challenging for the paint film to stick. There may be cases where sweep blasting or specialized surface treatment is necessary. Designing specialized processes is important. We also provide detailed examples of improvements in publicly available materials.

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Insufficient cleaning is the cause of all painting defects and the truth behind recontamination.

Insufficient cleaning is the cause of all painting defects and the truth behind recontamination.

Post-cleaning environmental management is important.

【Problem】Residual oil and contaminants left on the surface due to insufficient cleaning cause poor adhesion. 【Cause】Recontamination occurs due to leaving the surface after degreasing / Dust and oil from the environment adhere / Insufficient cleaning does not provide a fundamental solution / If drying is inadequate, moisture remains. 【Management Standards】It is recommended to paint immediately after cleaning and to minimize the waiting time. 【Improvement Example】By strictly managing the cleaning process, defects caused by recontamination are reduced.

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