... steel, tinplate, etc. It depends on your requirement. 5). Surface coating: zinc, silver, copper, black oxide, etc. 6). We can offer test ... material as requestedSurface treatmentkinds of plating (Zinc, Nikel, Chrome, Tin, Ag); Painting, Powder, Anodizing, E-coating, Silkscreen, Heat treatment, Black oxid.EngineerExperienced ...