Erosion-Corrosion Mechanisms of Engineering Steels in Different NaCl Concentrations

Abstract This study utilises a recently developed, enhanced approach to assess detailed aspects of the corrosive wear behaviour different steel grades in aqueous slurries containing three NaCl concentrations (0.05%NaCl, 3.5%NaCl and 10%NaCl). Erosion-corrosion testing was conducted using slurry impingement test rig damage quantified volume loss, potentiodynamic polarisation scans surface topography. Single- segmented specimens were adopted yield contribution degradation mechanisms two hydrodynamic zones (directly impinged surrounding area). The overall material losses from stainless steels observed increase with increasing salinity. However, loss for low-alloy found 0.05%NaCl 3.5%NaCl, before reducing when salinity further increased 10%NaCl. Changes have most effect on corrosion-enhanced mechanical mechanism. in-house developed technique demonstrated good linkage between single samples outer area region. it also showed that use can be less successful assessing highly turbulent impinged) regions.