Evaluation of Anticorrosion of NaNO2 on Reinforcing Steel in the Simulated Concrete Solution |
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Authors: | DU Rong-Gui HU Rong-Gang FENG Zu-De WANG Zhou-Cheng HU Yan-Ying TAN Jian-Gang LIN Chang-Jian |
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Institution: | State Key Laboratory for Physical Chemistry of Solid Surface, Department of Chemistry, Department of Materials Science, Institute of Physical Chemistry, Xiamen University, Xiamen 361005 |
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Abstract: | Reinforcing steel in concrete is usually in a passive condition due to the high alkalinity of the pore solution contained in the pores of concrete. However, the passivation may be lost and the corrosion occurs on the steel by a deceased of pH due to carbonation and/or by the penetration of chloride ions which come from the corrosion environment at the metal concrete interface. Pitting corrosion caused by the chloride is most harmful. Corrosion inhibitors can be applied to protect steel in the presence of chloride ions. The anticorrosion action of NaNO2 on the reinforcing steel in the simulated concrete solution containing NaCl has been studied using electrochemical technique and the other methods in this paper. |
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