High Quality Aluzinc Galvalume Steel Coils

The surface coating of the high quality aluzinc galvalume steel coils is composed of 55% aluminum, 43.5% zinc and a small amount of other elements. Under the microscopic level, the surface of the galvanized sheet is a honeycomb structure, in which zinc is contained in the "honeycomb" composed of aluminum. In this case, although the galvanized sheet also plays the role of anodic protection, the anodic protection effect is greatly reduced due to the reduction of zinc content and the fact that the zinc material is wrapped in aluminum and is not easy to electrolyze. Therefore, once the galvanized sheet is cut, the cut edge will quickly rust as it loses protection. Therefore, the galvanized sheet should be cut as little as possible. Once cut, the edge should be protected with anti-rust paint or zinc-rich paint to extend the service life of the sheet.