Surface Characteristics and Corrosion Tendency of TIG-Welded Low Carbon Steel Sheet Affected Cold Galvanizing and Processed by Immersion in Sodium Chloride Solution

A low-carbon steel sheet welding joint, which was coated and uncoated, was investigated in the present study using the TIG welding procedure in order to measure corrosion behavior in both types of joints. It was determined that the sheet welded joints, both coated and uncoated, were all subjected to the same test conditions, which included immersion in a corrosive environment containing a neutral solution of a concentration of 3.5% sodium chloride and a concentration of pH 7 at room temperature. The extent to which the surface characteristics of the welding joints were affected by these conditions was evaluated for periods ranging between 1, 2, 3, 4, and 5 months. The surface properties of the surface were significantly changed after completing each period, including topography, roughness, and corrosion products after completing each period. During the experiment, the results revealed that after 5 months of being coated with a NaCl solution with a concentration of 3.5%, the roughness values decreased in coated specimens, as well as the corrosion products were reduced.