Abstract:
The environment in which a steel structure is built affects the durability of its components, vis-à-vis the corrosion indexes according to ABNT NBR 14643:2001 and EN ISO 9223:2012. Regarding steel tiles, the most effective protection alternative corresponds to the deposit of a metallic coating over the metal base. Depending on chosen material, multiple performances are possible face to the environment. In addition, mechanical parameters also influence durability, in special thickness and steel grade, which must be compatible with project premises. As such, this article presents a review on main coating alternatives available for steel tiles as well as minimum mechanical requirements to ensure well performance during its lifetime. Hence, Zinc-Magnesium-Aluminium alloy was found to be the best alternative in alkaline environments and, at the same time, thinner tiles, at most those with thickness less than 0,40 mm, are more susceptible to serviceability limit states due to their reduced effective flexural stiffness.