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Organofunctional Silane Corrosion Inhibitor Surface Treatment of Concrete to Mitigate Corrosion Due to Chlorides or Carbonation

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This paper describes the evaluation of the Organofunctional silanes in mitigating ongoing corrosion due to chlorides or carbonation.

Product Number: 51317--9130-SG
ISBN: 9130 2017 CP
Author: Neal Berke
Publication Date: 2017
Industry: Highways & Bridges
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Organofunctional silanes(OS) are increasingly being used to protect concrete bridge decks against chloride ingress and resulting corrosion. This paper describes the evaluation of the 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 ASTM G109 in which the concrete was carbonated and then cyclically ponded with water. The OS inhibitor was effective in mitigating both chloride induced and carbonation corrosion. In the case of the chloride induced corrosion there was a reduction in additional chloride ingress. Implications on the extended service life of treated structures is discussed.

Organofunctional silanes(OS) are increasingly being used to protect concrete bridge decks against chloride ingress and resulting corrosion. This paper describes the evaluation of the 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 ASTM G109 in which the concrete was carbonated and then cyclically ponded with water. The OS inhibitor was effective in mitigating both chloride induced and carbonation corrosion. In the case of the chloride induced corrosion there was a reduction in additional chloride ingress. Implications on the extended service life of treated structures is discussed.

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