... , 3.Zinc plated, powder coating 4.Welding technology steel welding Product, powder coating welding part Item Namesteel welding Product, powder coating welding partMaterialIron, carbon steel ... , powder coating, black anodizing, hot-dip galvanized, electrophoresis or othersHeat TreatmentAccording to customer's requirementsInspection FacilitiesProjection machine, roughness tester, salt spray testing ...