Pre-treatment: First, the workpiece needs to be pre-treated, including chemical degreasing, hot water washing, water washing, electrode degreasing and other steps, to ensure that the surface of the workpiece is clean and free of grease, so as to facilitate the subsequent electroplating process.
Author: Anna
The process of zinc electroplating includes the following major steps:
Pre-treatment: First, the workpiece needs to be pre-treated, including chemical degreasing, hot water washing, water washing, electrode degreasing and other steps, to ensure that the surface of the workpiece is clean and free of grease, so as to facilitate the subsequent electroplating process.
Electroplating: In the electroplating tank, the treated workpiece is put into the electrolyte containing zinc ions, and through the action of electric current, the zinc ions are reduced to metallic zinc on the surface of the workpiece to form the plating layer. This step is the core of zinc plating and determines the quality and thickness of the coating.
Post-treatment: After electroplating is completed, post-treatment is required, including washing, polishing, passivation and other steps. Passivation is to enhance the corrosion resistance and aesthetics of the plating layer, usually using chromate passivation, can form a variety of colors of passivation layer.
Drying: Finally, the treated workpiece is dried to ensure that the plating layer is firm and not easy to come off.
The purpose of zinc plating is mainly to prevent steel objects from corrosion and improve their corrosion resistance and service life. The zinc layer does not change easily in dry air, but in humid environments it forms a protective film of zinc alkali carbonate, which protects internal parts from corrosion. Even if the zinc layer is damaged, the combination of zinc and steel forms a microcell that protects the steel substrate.
By following these steps, zinc plating not only improves the corrosion resistance of the steel, but also adds to the decorative appearance of the product.