Evaluate Effect of Pulsed Current Gas Tungsten Arc Welding Process Parameter on Intergranular Corrosion of SS304L Weld

Austenitic stainless steel (ASS) is the most common type of which offers excellent weldability and mechanical properties. ASS being used for various applications i.e. automotive, oil gas chemical industries in welding process plays a prominent role. Welding selection main factor that emphasizes corrosion resistance properties aggressive environments. There are occurs but intergranular (IGC) forms during at elevated temperatures. IGC mainly grain boundaries structure resulting chromium depletion due to precipitation carbide boundary. In present work pulsed current tungsten arc (PCGTAW) was investigate by oxalic acid test as per ASTM A262 Practice A. Experiments performed based on Taguchi L9 using design experiments rates evaluated base metal, heat affected zone weld zone. This aimed optimize parameters followed regression analysis susceptibility weldment. this investigation, it has been found from ANOVA effects plots peak significant PCGTAW process. The results revealed more susceptible IGC. At end, observed optimum value current, frequency 100 A, 50 A 6 Hz respectively.