Influence of Surface Remelting Process on Corrosion Resistance of Welding Joints for SUS304 Stainless Steel by Electrode Arc Welding

Abstract

The electrochemical corrosion tests of SUS304 stainless steel joint which was welded by electrode arc welding show that. The welding energy has obviously effect upon corrosion resistance of welding joints. The welding current directly influences the corrosion resistance of heat affected zone (HAZ) of welding joint. The Surface of joints was remelted by the micro-plasma arc and argon arc process. It is suggested that corrosion resistance of welding joint was improved obviously after remelting. The main reasons for improving the corrosion resistance of welding joint may be that grain refined, chromium oxidation film formed and elements diffusion inhibited by arc-remelting process.