Abstract
Steel is mainly used in the chemical, mechanical, shipping and aerospace industries. The main connection method of steel is welding. Steel weld seams are weak areas in steel applications and vulnerable to the erosion of the chemical environment. In this paper, the corrosion behavior of steel welds and its mechanical properties are studied by taking Q235 steel as the base material and using arc welding, argon arc welding and acetylene-oxygen welding methods with chlorine corrosion solution concentration of 0.001 mol/L, 0.01 mol/L and 0.1mol/L. The experimental results show that different welding methods, etching solution concentration, and erosion time can cause different corrosion behaviors and potential distributions. In the early stage of corrosion, the potential peaks are greatly different. As corrosion time passes by, the potential peaks become smoother. The mechanical properties of tensile strength, Brinell hardness and impact energy show a same pattern, and the weld strength decreases with the time of chlorine erosion.
