Profile: Qingdao Jinbowantong International Trade Co., Ltd. is a comprehensive company for steel production and trading. Our main products are hot-dipped galvanized steel coils, galvalume(55%AL-zinc) steel coils, pre-painted steel coils, and corrugated roofing sheets. Galvanized steel coil is based on cold-rolled steel strip as substrate, after continuous hot-dip galvanizing process and produced products. This method tightly adheres the coating to the steel with an iron-zinc alloy bonding layer formed by a diffusion process while the heated steel strip is in contact with the molten zinc.