Galvanic Corrosion Between AISI304 Stainless Steel and Carbon Steel in Chloride Contaminated Mortars

摘要

Galvanic corrosion between AISI304 stainless steel and carbon steel in mortars has been studied byopen circuit potential, electrochemical impedance spectroscopy, and galvanic coupling currents. Thecorrosion state of the coupling rebar was also examined after removing the mortars. The resultssuggest that the carbon steel presents a high risk of galvanic corrosion in the initial stage when it iselectrically coupled with stainless steel in the chloride-contaminated mortars. However, for thestainless steel promotes the passivation of carbon steel, the risk of galvanic corrosion on carbon steelsignificantly decreased as the time extends. In addition, the water-cement ratio of mortars does nothave a dramatic influence on the galvanic corrosion between stainless steel and carbon steel in thechloride-contaminated environment.