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International Journal of Corrosion
Volume 2013 (2013), Article ID 853730, 16 pages
Research Article

Effect of Nitrite Ions on Steel Corrosion Induced by Chloride or Sulfate Ions

Concrete Laboratory, Department of Civil Engineering, Kyushu Institute of Technology, Kitakyushu-shi 804-8550, Japan

Received 24 June 2013; Revised 29 September 2013; Accepted 4 October 2013

Academic Editor: W. Ke

Copyright © 2013 Zhonglu Cao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The influence of nitrite concentration on the corrosion of steel immersed in three simulated pH environments containing chloride ions or sulfate ions has been investigated by comparing and analyzing the change of half-cell potential, the change of threshold level of or , the change of threshold level of / or / mole ratio, and the changes of anodic/cathodic polarization curves and Stern-Geary constant . The corrosivity of chloride ions against sulfate ions also has been discussed in pH 12.6, pH 10.3, and pH 8.1 environments containing 0, 0.053, and 0.2 mol/L , respectively.