... stable,softy and antioxidant,UV-resistantIron piece : phosphatization,rust cleaned,polished,powder coated,high temperature baking finished.Glass fiber ... .5).Diameter:114mm6).Wall thickness:2.0mm steel posts cleaned by sand-blasting,then coated with phosphatesolution,and then ... with electro-static powder coating.8).Steel rails and tubes cleaned by sand-blasting,then coated with electro-static powder ...