Processo de galvanização a fogo: principais erros e soluções na engenharia de projetos das estruturas metálicas.

Abstract

Carbon steel is a product widely used in industry and construction. It is a material composed of iron and carbon alloys and is used in the manufacture of various products. Their mechanic a l properties, weldability, paint adhesion, easy shaping, recycling and low cost are compared to other metal alloys which make them highly applicable. However, due to exposure to the environment itself, as well as soil, water, or the industrial atmosphere, chemical and electrochemical occur that cause the steel to wear out gradually, causing oxidation on the surface of the material. This oxidation is called corrosion, resulting in the formation of corrosion products. There are several corrosion protection processes in steel, this work will explain the hot dip galvanizing (HDG) process, which consists of not recovering the base metal with liquid zinc, in order to increase the corrosion resistance, as in most natural environments the rate of zinc degradation is much lower than the temperatures observed for carbon steel. The Brazilia n Association of Technical Standards (ABNT) standardizes the quality of the galvanizing process and the success of this classification is associated with a combination of galvanize r, manufacturer and designer information, as the structure or metal part design characteristics may improve. Or disqualify the zinc coating. This course completion paper aims to present major design errors and correction methods so that metal parts meet all ABNT qualification standards.