August 9, 2023
1. Passivation treatment
The so-called passivation treatment refers to the surface treatment method of chemical treatment in a certain solution to form a solid, dense and highly stable film on the coating. Passivation greatly improves the corrosion resistance of the coating and can increase the surface gloss and anti-pollution ability. This method is very versatile, after plating Zn, Cu, etc., it can be passivated.
2. Hydrogen removal treatment
For some metals such as zinc, in the process of electrodeposition, in addition to self-deposition, a part of hydrogen will be precipitated, and this part of hydrogen will penetrate into the coating, causing the coating to be brittle or even fractured, which is called hydrogen embrittlement. In order to eliminate hydrogen embrittlement, the plated parts are often heat treated at a certain temperature for several hours after electroplating, which is called hydrogen removal treatment.