... requirement.Surface TreatmentZn-plating, Ni-plating, Cr-plating, Tin-plating, copper-plating, the wreath oxygen resin spraying, ... black oxide coating, painting, powdering, color zinc-plated, blue black zinc-plated, rust preventive oil, titanium alloy galvanized, silver ... in the production of CNC/AUTO lathe, springs, shafts, screws, stamping parts and other metal parts. Our main production modes ...