Adhesion of paint and metal is poor. General solution is chemically converting metal surface to an metal protective film as medium layer of painting.Catcher independently developed a non-chrome green protective film process that meets RoHS requirements. The non-chrome protective film passes 12 hour-long salt spray tests. After painting, it can even pass 96 hour-long salt spray tests. Metallic protective film technology is the best surface process technology for diecast alloys.
