What is chrome plating on aluminum alloy surface

Chromizing will form a layer of chemical conversion film on the surface of the product. The film thickness is 0.5-4um. This layer of conversion film has good adsorption and is mainly used as the bottom layer of the coating.

• Aluminum alloy chrome plating process

Gasoline or trichlorethylene degreasing → airing → drying→ cooling → fixture → weak alkali corrosion → washing in warm water → cleaning in running water → soaking in nitric acid → washing in clean water → cleaning in running water → soaked in zinc → galvanizing → cleaning in running water → Clear water washing → chrome plating → cleaning in recovery tank → water washing → lower fixture → water washing → hot water washing → drying → cooling → self-inspection.

• The role of chrome plating on aluminum alloy

Aluminum alloy chrome plating is a common surface treatment technology, which can give aluminum alloys more beautiful, corrosion-resistant, wear-resistant and other properties. In industrial production and daily life, chrome plating is widely used. The aluminum alloy after chrome plating presents a noble and elegant appearance. Chromium has strong oxidation resistance and corrosion resistance, which can effectively prevent aluminum alloys from being corroded by oxidation, corrosion and other factors. Therefore, many internal aluminum alloy products such as automobiles and mechanical equipment have adopted chrome plating technology to prolong their service life and maintain their beautiful appearance. In terms of wear resistance, chromium has high hardness and wear resistance, which can effectively prevent the surface of metal products from being affected by factors such as wear and scratches. Therefore, the use of chrome plating technology can increase the service life of aluminum alloy and improve its efficiency.

• Quality requirements

1 The color is uniform, the film layer is fine, there should be no bumps, scratches, touch with hands, no roughness, dust, etc.

2 The film thickness is 0.5-4um.