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Journal of Chemistry
Volume 2015, Article ID 402182, 15 pages
http://dx.doi.org/10.1155/2015/402182
Research Article

Effect of Nitrite Inhibitor on the Macrocell Corrosion Behavior of Reinforcing Steel

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

Received 19 November 2014; Accepted 28 February 2015

Academic Editor: Katarina Marušić

Copyright © 2015 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.

Abstract

The effect of nitrite ions on the macrocell corrosion behavior of reinforcing steel embedded in cement mortar was investigated by comparing and analyzing the macrocell corrosion current, macrocell polarization ratios, and slopes of anodic and cathodic steels. Based on the experimental results, the relationship between macrocell potential difference and macrocell current density was analyzed, and the mechanism of macrocell corrosion affected by nitrite ions was proposed. The results indicated that nitrite ions had significant impact on the macrocell polarization ratios of cathode and anode. The presence of nitrite could reduce the macrocell current by decreasing the macrocell potential difference and increasing the macrocell polarization resistance of the anode.