Effect of cavitation on the corrosion behaviour of welded and non-welded duplex stainless steel in aqueous LiBr solutions

The influence of cavitation on the corrosion resistance of EN 1.4462, its filler metal, and the welded metal obtained by GTAW was investigated by potentiodynamic curves in LiBr heavy brine solution under static and dynamic conditions at 25 °C. The corrosion behaviour of the tested alloys is modified by the presence of chromates (inhibitor) in the medium. The corrosion potential in the solution with chromates shifted towards the active direction when cavitation was present; on the contrary, in the solution without inhibitor, cavitation led to a noble shift in the corrosion potential favouring the cathodic reaction.