Cavitation erosion-corrosion behaviour of Fe-19Cr-15Mn-0.66 N high nitrogen austenitic stainless steel in sodium chloride solution

Abstract

The cavitation erosion behaviors of Fe-19Cr-15Mn-0.66N high nitrogen austenite stainless steel in distilled water and 0.5 mol/L NaCl were investigated by conducting mass loss and electrochemical measurements. The mass loss of HNSS after CE for 8 h in 0.5 mol/L NaCl solution is 1.15 times of that in the distilled water. The magnitude of impedance decreased within 5 h and then leveled off with a slow decrease. Cavitation erosion has a significant effect on the composition of the passive film, resulting in a notable increase in the Cr2O3 and Fe2O3.

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