A Comprehensive Investigation on the Effects of Surface Finishing on the Resistance of Stainless Steel to Localized Corrosion

The present research investigates the influence of surface roughness imparted by cold finishing processes on localized corrosion resistance stainless steel. Five different alloys were studied: ferritic AISI 430, martensitic 430F, austenitic 303, 304L, and 316L. It was demonstrated that grinding process, executed previously drawn bars, leads to an improvement in according results obtained with electrochemical tests, namely, potentiostatic potentiodynamic tests chloride-rich environments, salt spray test, long-term exposure urban marine atmospheres. This allowed us establish a trend among regarding pitting corrosion, which assessed potentials, critical chloride contents, initiation time. All confirmed finishing, as well alloy chemical composition, is important factor controlling