Abstract
The erosion–corrosion resistance of high alloy stainless steel UNS S32654 and standard stainless steel UNS S31603 has been assessed under liquid–solid impingement conditions. The electrochemical characteristics of the two stainless steels have been examined via free corrosion potential measurements, anodic polarisation, linear polarisation and potentiostatic control in erosion–corrosion. It has been shown in this paper that high alloy stainless steel UNS S32654 exhibits better corrosion and erosion–corrosion performance than lower grade alloy UNS S31603. A general linear relationship between two electrochemical parameters ( E corr and R p) has been shown in this study. A critical solid loading between 60 and 100 mg/l, at which there is a transition from corrosion to erosion–corrosion for the two stainless steels under different conditions, has been determined.
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