Thermostatic shower faucets are coated with a process called electroplating, which is a type of surface treatment that uses an electric current to coat a metal object with a thin layer of metal or alloy.

Here are the main steps in the electroplating process for thermostatic shower faucets:

Cleaning and preparation: The shower faucet is first cleaned and prepared to ensure that the surface is free of dirt, oils, and other contaminants that could affect the coating process. The faucet is typically cleaned using a degreasing solution and rinsed with water.

Pre-treatment: The faucet is then treated with a solution to prepare the surface for electroplating. This process typically involves dipping the faucet in a series of chemicals, including an acid-based etchant and a neutralizing solution to remove any remaining contaminants and improve the adhesion of the coating.

Plating: Once the faucet is pre-treated, it is ready for electroplating. The faucet is placed in a plating tank filled with a solution of metal ions, such as nickel or chrome, and an electrode is placed in the tank. An electric current is applied to the electrode, causing the metal ions to bond to the surface of the faucet. The length of time that the faucet remains in the plating tank and the current applied will determine the thickness of the coating.

Post-treatment: Once the plating is complete, the faucet is rinsed with water to remove any excess plating solution. The faucet may then undergo additional treatments, such as polishing or buffing, to improve the appearance of the coating and remove any imperfections.

Quality control: Finally, the faucet is inspected to ensure that the coating is uniform and free of defects. This may involve visual inspections or specialized tests to assess the thickness and adhesion of the coating.

Overall, the electroplating process is an important step in the production of thermostatic shower faucets, as it provides a durable and attractive coating that can withstand the rigors of daily use in a bathroom setting.