Chrome plating technology for zinc alloy plating bathroom accessories

Chromium plating process flow for zinc alloy plating bathroom accessories
Pretreatment: including cleaning, degreasing, rust removal, activation and other steps to ensure that the surface of the zinc alloy substrate is clean, free of oil and oxide layer, and provide a good bonding surface for chrome plating.
Chromium plating: Put the treated zinc alloy accessories into the chrome plating tank and deposit a chromium layer on the surface through electrolysis. In this process, the composition, temperature, current density and other parameters of the chrome plating solution must be strictly controlled to ensure the quality of the coating.
Post-treatment: After chrome plating, post-treatment steps such as cleaning and drying are required to remove residual chrome plating solution and moisture, and improve the adhesion and corrosion resistance of the coating.
Key technical points of chrome plating process
Chrome plating solution formula: The composition of the chrome plating solution has a direct impact on the quality of the coating. A reasonable chrome plating solution formula should contain an appropriate amount of chromic anhydride, sulfuric acid, additives, etc. to ensure the gloss, hardness and corrosion resistance of the coating.
Current density control: Current density is an important factor affecting the thickness and uniformity of the coating. During the chrome plating process, the current density needs to be precisely controlled according to the shape, size and chrome plating requirements of the zinc alloy substrate to obtain the ideal plating effect.
Temperature control: The temperature of the chrome plating solution also has a significant impact on the quality of the coating. Too high or too low a temperature will cause a decrease in the quality of the coating. Therefore, during the chrome plating process, the temperature of the chrome plating solution must be strictly controlled to keep it within a good range.
Agitation and circulation: Agitation and circulation in the chrome plating solution help to evenly distribute the composition and temperature in the plating solution, and improve the uniformity and quality of the coating. Therefore, during the chrome plating process, the plating solution must be fully stirred and circulated.