... made,Hot Dip Galavanizing, Manual Arc Welding,Rust-proof Treatment:1. Antirust Paint (rust preventer functions 3-5years) 2. Hot Dip ... Galavanizing (rust preventer functions about 10 years) 3.Cold Galavanizin 4. ... least 1 metre). hot galvanizingwrought iron handrail Surface treatmentrust preventive coating cold galvanizing bronzy,dark bronze,red bronzewrought iron handrail ...