engleski

Long-term corrosion behaviour of stainless reinforcing steel in mortar exposed to chloride environment

Long-term corrosion behaviour of six stainless reinforcing steels embedded in mortar and exposed to chloride media was monitored by electrochemical impedance spectroscopy at the open circuit potential during the period of two years. Corrosion behaviour of studied steels was divided into two phases characterized by different interfacial behaviour: i) passive phase and ii) pitting propagation phase. After two years, duplex steel 1.4362 showed very good corrosion performance similar to austenitic steel 1.4401. Steel types with low Ni content but with high N and Mn content, 1.4597 and 1. 4162, showed lower corrosion resistance compared to austenitic steel 1.4301.

stainless steel; mortar; EIS; passivity; pitting corrosion

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