In the present work, a design of experiment (DOE) technique, the Taguchi method, has been used to optimize the pulsed current gas tungsten arc welding (PCGTAW) parameters for the corrosion protection of super duplex stainless steel (UNS S32760) welds. A L 9 (3 4 ) orthogonal array (OA) of Taguchi design which involves nine experiments for four parameters (pulse current, background current, % on time, pulse frequency) with three levels was used. Corrosion resistance in 3.5%NaCl solution was evaluated by anodic polarization tests at room temperature. Analysis of variance (ANOVA) is performed on the measured data and S/N (signal to noise) ratios. The higher the better response category was selected to obtain optimum conditions. The optimum conditions providing the highest pitting potential were estimated. The optimum conditions were found as the second level of pulse current (120 A), second level of background current (60 A), third level of % on time (80) and third level of pulse frequency (5 Hz). Under these conditions, pitting potential was predicted as 1.08 V SCE that was very close to the observed value of 1.06 V SCE . As a result of Taguchi analysis in this study, the pulse current was the most influencing parameter on the corrosion resistance and the background current was the next most significant effect. The percentage contributions of the pulse current, the background current, % on time, and pulse frequency to the corrosion resistance are 66.28%, 25.97%, 2.71% and 5.04%, respectively. Consequently, the Taguchi method was found to be promising tool to obtain the optimum conditions for such studies. Moreover the experimental results obtained confirm the adequacy and effectiveness of this approach. Morover, in this research, the influence of step annealing heat treatment on the microstructure and pitting corrosion resistance of super duplex stainless steel UNS S32760 welds have been investigated. Pitting corrosion resistance in chloride solution was evaluated by potentiostatic measurement. The results showed that step annealing treatments in the temperature range of 550–1000 °C resulted in a precipitation of sigma phase and Cr 2 N along the ferrite/austenite and ferrite/ferrite boundaries. At this temperature range, the metastable pits mainly nucleated around the precipitates formed in the grain boundary and ferrite phase. Above 1050 °C, the microstructure contains only austenite and ferrite phases. At this condition, the critical pitting temperature of samples successively arrived to the highest value obtained in this study.