| The effect of two welding processes, laser welding (LW) and gas tungsten arc welding (GTAW), on the corrosion behavior of 304 stainless steel is investigated. Various electrochemical methods such as Scanning reference electrode technique (SRET), potentiodynamic scans and capacitance measurements were used to determine the localized corrosion susceptibility, initiation and propagation of pitting and SCC in the weld zones. The experimental results reveal that SCC and pitting susceptibility depend on the microstructure of the stainless steel material. The weld metal (WM) of LW has better corrosion resistance than that of GTAW The behavior of SCC and pitting corrosion directly correlated to the stability of the altered passive film by the welding processes. |
