笹川メッキ List of Products and Services

The removal of black scale and heat treatment scale affects the corrosion resistance of the product and the finish of surface treatments such as plating. Generally, scale removal is performed using methods such as: - Shot blasting (for mass-produced items or large parts) - Grinding and polishing (for localized removal or small parts, in small quantities) - Chemical treatments such as pickling (regardless of quantity, size, or shape). Mechanical methods like shot blasting and grinding can be challenging for fine parts. Scale removal for fine parts is often done through chemical treatment; however, unlike mechanical methods that physically grind away the material, there may be residual strong scale or impurities left behind, which can result in an uneven finish in plating. Our "acid barrel polishing" combines the effects of chemical dissolution using acid and physical polishing through barrel polishing, making it a scale removal method suitable for fine parts. This method allows for efficient scale removal, burr removal, and pre-treatment for plating of fine parts, leading to a reduction in processing time. Prototyping is also possible, so please feel free to contact us.

• Steel

Our company offers "black dyeing of precision processed products," which allows for a uniform and beautiful finish. Thanks to processing equipment designed specifically for black dyeing, it is possible to dye small parts with overlapping shapes, such as plate-like components, without unevenness. It also contributes to solving issues such as the adhesion of white powder to the product surface due to residual caustic soda, as well as discoloration to brown. 【Features】 ■ High-quality black dyeing provided in Tsubame-Sanjo, Niigata Prefecture ■ Maximum processing size is H300×W350×D350mm ■ Numerous achievements with precision processed products, including tools and machine parts ■ Suitable for high-precision parts with minimal dimensional accuracy changes *For more details, please refer to the materials. Feel free to contact us with any inquiries.

• Coating Agent

One of the appearance troubles of plating is "gloss unevenness." Have you ever experienced that the finish of the plating is not uniform, that the gloss differs between the front and back of the product, or that there are differences in gloss between lots? Various factors influence the finish of plating, but what kind of differences in conditions can cause gloss unevenness? Factors that affect the gloss of plating include: A) Differences in the surface roughness of the product substrate B) Residual oil, dirt, or scale on the product C) Differences in plating film thickness D) Management of the plating solution (such as pH and gloss agent addition) E) Etching during pre-treatment of plating Possible countermeasures for each factor include: a) Uniforming surface roughness through polishing or blasting b) Reviewing pre-treatment conditions and barrel polishing or blasting c) Reviewing plating conditions, racking methods, and jigs d) Regular liquid analysis and appropriate replenishment and renewal e) Reviewing pre-treatment conditions (such as pickling) Since the treatment processes and conditions vary among plating companies, it can be difficult to respond even if the cause is understood. Our company can adjust treatment conditions according to the state of the product. Please feel free to consult with us.

• Other machine elements

Black dyeing treatment is a surface treatment that reacts iron products in a high-temperature alkaline solution to form a black oxide film known as magnetite (Fe3O4). It has rust prevention effects and benefits such as anti-reflection and aesthetic enhancement. Black dyeing of general steel materials (raw materials) usually results in a deep black finish. However, for some materials, such as cast iron or those that have been hardened, as well as alloy steels that contain high amounts of chromium or other nickel, the result may be a reddish-black or a light gray instead of black. Additionally, wire-cut surfaces may appear brownish, resembling rust. The following causes can be considered: - Residual oil (insufficient degreasing) - Inadequate removal of the oxide film - High content of components other than iron in the material, leading to uneven reactions - Rough surface of the material, resulting in uneven reactions The following countermeasures can be taken: - Strengthening degreasing and cleaning - Removal of the oxide film through acid washing - Removal of thick oxide films and uniformity of surface roughness through sandblasting - Selection of black dyeing solutions suitable for alloy steels (such as SUS) Based on years of experience, our company selects black dyeing processes tailored to the material and processing history. If you have any concerns about black dyeing, please feel free to consult us.

• Other machine elements

Black dyeing treatment is also referred to as "ferric oxide treatment." When iron products are reacted in a high-temperature alkaline solution, black iron oxide known as ferric oxide is produced. The black dyeing film has the property of gradually discoloring (oxidizing) to red over time as it reacts with water and oxygen in the air. The time it takes for discoloration to occur varies depending on the type of iron material, processing history, thickness of the black dyeing film, and storage conditions. To prevent discoloration of the black dyeing, it is important to constantly protect the surface with oil or similar substances and to avoid reactions with moisture in the air. Care should be taken during long-term storage as the oil may dry out. Our company adjusts the black dyeing treatment process according to the type of iron material. Additionally, while products are usually completed with an oil coating, if desired, a clear coat can be applied to further enhance corrosion resistance. Please feel free to consult us with any concerns regarding black dyeing.

• Other machine elements

Since our establishment in 1928, our company has a wealth of experience in metal surface treatment. We are currently offering materials that explain information about "surface treatment for black dyeing" for engineers who want to dye their workpieces black or are facing challenges with their current black dyeing processes. The materials introduce basic knowledge and points to consider during construction, including widely used types and features of black plating, chemical treatment, painting, anodizing, and anodic oxidation coloring. [Contents (excerpt)] ■ Representative examples of black plating ■ Overview and benefits of black dyeing (ferric oxide) ■ Overview and benefits of painting ■ Overview and benefits of anodizing ■ Overview and benefits of anodic oxidation coloring You can view the detailed content immediately by clicking the "Download Button."

• Surface treatment contract service

Our company collaborates with partner factories to perform "oxidation coloring treatment." This technology alters the thickness of the oxide film present on stainless steel and titanium through chemical processing, allowing us to control the interference colors, which change subtly depending on the viewing angle. While enhancing the metallic luster and surface texture, we can achieve vibrant colors and a variety of hues; however, due to the chemical changes involved, there are limitations to the colors that can be produced. *For more details, please refer to the PDF document or feel free to contact us.*

• Surface treatment contract service
• Processing Contract

Our company collaborates with partner factories to perform "anodizing treatment." This is a technology that artificially generates a thick oxide film on the surface of aluminum, which enhances the corrosion resistance, decorative properties, and wear resistance of aluminum. Additionally, by applying a sealing treatment after anodizing, we can prevent color fading and increase the strength of the film, thereby improving corrosion resistance and weather resistance. This process is used in various aluminum products around us, such as miscellaneous goods, home appliance parts, and building materials. 【Features】 ■ Various color tones can be achieved by adsorbing dyes onto the oxide film. ■ The surface can be hardened, increasing its strength. ■ The film may peel off if bent. ■ There is a possibility of cracking at temperatures above 100°C. *For more details, please refer to the PDF document or feel free to contact us.

• Surface treatment contract service
• Processing Contract

This document introduces basic knowledge about plating, including the history of plating and its purposes. It explains the mechanisms using examples of electroplated nickel and electroless nickel plating. The field of plating is highly specialized, and the types of plating, as well as the materials and sizes that can be processed, vary by plating companies. If you have any concerns regarding surface treatment, please feel free to consult us about anything. [Contents] ■ What is plating ■ The mechanism of plating ■ How to achieve good plating ■ Materials that can be plated *For more details, please download the PDF or feel free to contact us.

• Plating Equipment

"Plating stripping" refers to the process of removing the plating that is adhered to the surface. It is a delicate process as it can damage the material with chemicals. It is important to choose the appropriate stripping agent and method according to the properties of the metal material and the type of plating being stripped. Our company can also remove the existing plating and apply a different one. 【Specifications】 ■ Applicable materials: Iron, SUS, Copper, Brass ■ Tank dimensions: H400×W600×D500 ■ Processable size: H350×W500×D400 *For more details, please download the PDF or feel free to contact us.

• Plating Equipment

The barrel container rotates, causing the workpiece and the polishing stone to rub against each other, polishing the entire item. Since large-scale polishing can be done in the barrel, it is efficient and less likely to produce variations in quality. We have a track record of handling various pressed products and products after heat treatment. 【Specifications】 ■Applicable materials: Iron, stainless steel ■Processable sizes: From a few centimeters to approximately palm-sized *For more details, please download the PDF or feel free to contact us.

• Plating Equipment

Chemical cleaning process to remove oxides (scale) adhering to the surface of metal products using an acidic solution. It is suitable for cases such as wanting to remove welding burn, removing black skin, or cleaning dirt as a pre-treatment for plating. Our company also offers "acid barrel polishing," which allows for simultaneous acid pickling and barrel polishing. By removing scale and polishing the surface of small parts at the same time, it efficiently removes scale, leading to shortened processes and stabilized quality. 【Specifications】 ■Applicable material: Iron ■Tank dimensions: H800×W1100×D900 ■Processable size: H700×W1000×D800 *For more details, please download the PDF or feel free to contact us.

• Plating Equipment

In February 2023, we established a new dedicated line for electroless nickel plating! 【Specifications】 ■ Applicable materials: Iron, Copper ■ Usable thickness: 1 to 20 µm ■ Tank dimensions: H500×W1000×D600 ■ Processable size: H450×W450×D450 Electroless nickel plating is a method that uses only chemical reactions for plating without electricity. Unlike electroplating, it allows for uniform thickness on parts with complex shapes. It can also plate inside bag holes and the inner sides of pipes, which is difficult with electroplating. It is suitable for plating precision equipment parts. *For more details, please feel free to contact us.*

• Plating Equipment

Generally referred to as "Parker treatment" or "phosphate coating treatment," there are four types of treatments (zinc phosphate, manganese phosphate, calcium phosphate, and iron phosphate) depending on the differences in the phosphate solution. Our company performs "zinc phosphate treatment." This treatment can improve the corrosion resistance of steel products. Due to its high adhesion, it is also commonly used as a base for painting. Its good oil affinity contributes to improved lubricity and wear resistance. 【Specifications】 ■Applicable material: Steel ■Tank dimensions: H350×W450×D450 ■Processable size: H300×W350×D350 *For more details, please download the PDF or feel free to contact us.

• Plating Equipment

"Black dyeing treatment" is a method that forms a black ferric oxide film on the surface of metals to prevent rust. It results in a black film with a metallic luster, giving it a beautiful appearance. A uniform thin rust-proof film is formed through chemical treatment, with a thickness of about 1μm, resulting in minimal dimensional changes, making it suitable for high-precision components such as precision machine parts, cutting tools, and other high-accuracy parts. Our company typically applies oil after black dyeing to protect the film. If you want to enhance the corrosion resistance of the black dye film, a "black dyeing + top coat" option is also available. 【Specifications】 ■Applicable materials: Iron, SUS ■Tank dimensions: H350×W450×D450 ■Processable size: H300×W350×D350 *For more details, please download the PDF or feel free to contact us.

• Plating Equipment

Our "Semi-Chrome (Tin-Cobalt) Plating" features a glossy silver finish reminiscent of chrome plating. This tin-cobalt alloy plating is widely used as an alternative to chrome plating because it can achieve a chrome-like appearance while being hexavalent chromium-free. Additionally, it adheres better and has superior uniform electroplating properties compared to chrome plating, making it suitable for complex shapes. 【Specifications】 ■Applicable materials: Iron, Copper, Brass ■Processable size: φ1.8mm to approximately palm-sized (barrel production only) *For more details, please download the PDF or feel free to contact us.

• Plating Equipment

"Nickel plating" is a metal that emits a beautiful silvery-white luster. It forms a transparent oxide film on its surface, which serves as a barrier function, providing excellent rust resistance. It is effective in improving corrosion resistance and conductivity, and is widely used in fastening components such as bolts, nuts, and rivets, as well as mechanical parts like springs and washers, and electronic components. With barrel plating equipment, it is possible to efficiently plate a large number of small parts. This allows for stable quality of small parts and shorter delivery times. Additionally, our company can consistently perform barrel polishing and chemical polishing for deburring and scale removal of small parts. 【Specifications】 ■Applicable materials: Iron, copper, brass ■Processable size: Approximately φ1.8mm to palm-sized *For more details, please download the PDF or feel free to contact us.

• Plating Equipment

"Nickel plating" is a metal that emits a beautiful silver-white luster. It forms a transparent oxide film on its surface, which acts as a barrier and provides excellent rust resistance. Our fully automated nickel plating line employs a "double nickel" technique, layering nickel in two coats. This results in a coating characterized by high corrosion resistance and a uniform, substantial luster. Additionally, nickel plating excels in heat resistance and conductivity, making it suitable for use in electronic components and precision machinery parts. 【Specifications】 ■ Applicable materials: Iron, copper, brass ■ Tank dimensions: H1200×W650×D1100 ■ Processable size: H1000×W500×D300 *For more details, please download the PDF or feel free to contact us.

• Plating Equipment

"Chrome plating" is a metal that emits a beautiful silvery bluish luster. It has a very high hardness and forms a transparent oxide film on its surface, which serves as a barrier and provides excellent rust resistance. Not only is it beautiful, but it also excels in corrosion resistance, heat resistance, and wear resistance, making it widely used for "industrial applications" that take advantage of these properties. Our nickel-chrome plating adopts a "double nickel" with a two-layer nickel plating as the base, characterized by high corrosion resistance and adhesion. [Features] - Mass production using an elevator-type fully automatic plating line, capable of short delivery times - A wide variety of jigs that can accommodate both mass production and small lots - High corrosion-resistant double nickel - "Eighty percent of plating defects are due to pretreatment," so we are particular about pretreatment *For more details, please download the PDF or feel free to contact us.

• Plating Equipment

~We are confident in our careful work and high quality~ Our handling experience spans a wide range of industries, including tool manufacturers, machinery manufacturers, and air conditioning manufacturers. While there are limitations on the materials we can handle, we can offer a wide variety of surface treatments for iron, copper, brass, and more. We have extensive experience in surface treatments for forged and heat-treated products, with a wealth of know-how in high mass production quality, timely delivery, and trouble resolution. ★ Improvement of plating gloss and color unevenness Based on years of experience, we consider the optimal jigs and processing conditions according to product shape, material, and material condition. We conduct thorough inspections of gloss, scratches, and dirt as needed to manage appearance quality. ★ Prevention of stains and discoloration We propose methods to enhance the corrosion resistance of the plating film to address issues such as stains and discoloration after plating. ★ Prevention of scratches, dents, and abrasion marks on plated products We handle products carefully and implement measures throughout the plating process, including the packaging method of the finished products. ★ Improvement of product dimensions after plating Depending on the type of plating, we adjust the film formation conditions in micrometer units and measure and manage the thickness using a film thickness gauge. We also have numerous achievements in resolving various plating and chemical treatment issues! Please feel free to contact us for more details.

• Processing Contract