Product introduction

　

Trivalent chromate (Black)

Trivalent chromate (black) refers to trivalent chromate that has been adjusted to be black in color. After zinc plating, treatment is carried out with chromic acid, during which sulfur and cobalt added to the treatment agent react to form cobalt sulfide, resulting in the black color. It is treated as a color variation of trivalent chromate (white) and is used when there is a need to distinguish by plating color or to match the appearance color with other components.

Nickel

Nickel, as its name suggests, refers to the plating process using nickel. It has a beautiful appearance and excellent corrosion resistance, and is used in a wide range of applications. Depending on the method of treatment, it is divided into two types: electroplated nickel and electroless nickel plating. Electroplated nickel uses electricity supplied from an external power source, while electroless nickel plating does not use electricity and instead applies the plating through a chemical reduction process. Electroless nickel plating is characterized by its ability to deposit a more uniform coating compared to electroplated nickel.

Chrome

Chrome refers to a plating process that deposits a metal called chromium onto objects. It is divided into decorative chrome plating and hard chrome plating depending on the application. Decorative chrome plating utilizes the shiny tone of chromium and is used to enhance the appearance. Hard chrome plating forms a thicker layer compared to decorative chrome plating, creating a coating that excels in hardness, wear resistance, and adhesion, and is used for industrial products such as machine parts and molds.

Hexavalent chromium

Chromate treatment refers to a chemical treatment using chromic acid performed after zinc plating, and those that use hexavalent chromium are called hexavalent chromate. Hexavalent chromate has excellent corrosion resistance, and even if the coating is scratched, water-soluble hexavalent chromium dissolves and possesses a self-repairing action that allows it to repair the coating itself. In the past, hexavalent chromate occupied the majority of chromate treatments, but in recent years, due to growing concerns about environmental pollution and health risks associated with hexavalent chromium, there has been a movement to restrict its use, leading to a shift towards trivalent chromate, which uses trivalent chromium as a replacement.

Unichrome

Unichrome refers to a process that applies a glossy chrome plating to zinc plating. The color tone is silver with a bluish tint, and by applying Unichrome, the corrosion resistance of zinc plating is improved, and the appearance also becomes better. However, since Unichrome uses hexavalent chromium in the plating process, it has a significant environmental impact, and there is a transition towards using trivalent chromate, which employs trivalent chromium, similar to hexavalent chromate.