Organofunctional Silane Corrosion Inhibitor Surface Treatment Protects Concrete

Organofunctional silanes (OS) are increasingly used to protect concrete bridge decks against chloride ingress and resulting corrosion. This article describes the evaluation of OS in mitigating ongoing corrosion due to chlorides or carbonation. The procedure used for determining the mitigation of chloride-induced corrosion is a new test protocol, M-82, developed by the U.S. Bureau of Reclamation in conjunction with the Strategic Development Council of the American Concrete Institute. The mitigation of carbonation-induced corrosion was determined using a modified version of an ASTM standard. The OS inhibitor was effective in mitigating both chloride-induced and carbonation corrosion. For chloride-induced corrosion, there was a reduction in additional chloride ingress.