How to protect spring surface?
Spring surface treatment DACROMET The spring surface is generally treated with special treatments to achieve corrosion and oxidation resistance. Such as blackening (blue), phosphating, electroplating, plastic spraying, etc. Then the zinc-chromium film DACROMET appeared. The DACROMET protective layer has excellent corrosion resistance, which is 7-10 times that of the electroplating layer. There is no hydrogen …