The thickness of AZ150 coating is 18 microns on one side and 36 microns on both sides. The coating alloy of the steel consists of 55% aluminium, 43.4 zinc and 1.6 silica. This coating of steel acts as a passive barrier to general corrosion. Once the sheet is exposed to electrolyte or moisture, another coating may form a galvanic cell. This exposure results in spillage of zinc ions and corrosion protection of the exposed steel. It also helps protect steel from trimmed edges and scratches.
