Abstract
AbstractAustenitic stainless steel welds with different ferrite contents (4 and 12 FN) were obtained by the Submerged Arc Welding (SAW) strip cladding process, and some clads were remelted by TIG. The welds were post weld heat treated (PWHT) at 600, 800, 1000°C for 1 h. Pitting potentials were measured in 1 N H2SO4 + 0.5 N NaCl. Etching at the pitting potentials was carried out in the same solution in order to locate the pit sites; pitting studies were also conducted in 10% FeCl3 solution.The results showed that an increase in ferrite content decreases pitting resistance. PWHT at 800°C decreases pitting resistance, too, whereas PWHT at 1000°C results in increased pitting resistance at austenite/ferrite interfaces. TIG samples showed less pits than their SAW counterparts.
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