Black treatment to prevent iron from rusting.
Black dye plating (treatment) is one of the chemical treatments that involves causing a chemical change (chemical reaction) on the surface of iron through alkaline processing to dye it black, creating an oxidized film of ferric oxide, commonly known as black rust, on the surface. Black dye plating (treatment) is often used for parts where dimensional accuracy needs to be maintained or where cost reduction is desired. It not only protects the surface of metal materials but is also used for decorative purposes and to enhance light absorption properties.
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basic information
Black dye plating (treatment) involves immersing the object in an alkaline aqueous solution to induce a chemical reaction, resulting in the formation of an oxidation film of iron(III) oxide, commonly known as black rust, on the surface of the metal material. After treatment, the surface appears black due to the plating, which may give the impression that it has been dyed black, but in reality, it generates black rust on the metal surface. Black dye plating (treatment) has the characteristic of a relatively thin film thickness of the generated coating, which may lack corrosion resistance and strength, but it is notable for causing minimal dimensional changes due to plating. Therefore, it is very suitable for treatments where one does not want to alter the dimensions of the material. Simply put, it is a treatment that intentionally allows the surface to rust to prevent further rusting.
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Applications/Examples of results
Parts for working machinery and industrial machinery that require a thin black coating, parts that need corrosion resistance, and parts that need heat resistance.
Company information
We perform plating processing on components used in various industries, including semiconductor parts, satellite parts, ship parts, and food-related components. Our strength lies in our high technical skills, which are a result of our thorough quality management system! We often receive comments from customers such as, "The quality of Sanwa Plating Industry is very trustworthy." We aspire to be a company that contributes to solving the challenges of businesses across Japan by leveraging the technology we possess. Additionally, as a company philosophy, we value the idea of considering the entire company as one family.
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