Abstract
AISI 304 is Cr-Ni austenitic stainless steel currently used for numerous applications that require high corrosion resistance. Due to the passive surface film this steel is resistant against a uniform corrosion, but halides present in environment can evoke local pitting. Electropolishing is recommended to obtain the high quality passive film and to increase the pitting corrosion resistance. This paper is focused on the assessment of the effect of elevated temperature (50 °C) on the resistance of AISI 304 electropolished surface to pitting corrosion in acidified 1 M chloride solution. Evaluation is based on the results of electrochemical cyclic potentiodynamic polarization tests (determination and comparison of pitting potentials Ep) and on the microscopic observation of specimen surfaces attacked by pitting during performed testing procedure.
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