期刊
CORROSION SCIENCE
卷 53, 期 4, 页码 1322-1330出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2010.12.028
关键词
Mild steel; Electrochemical noise; Pitting corrosion; Passive films; Repassivation
资金
- National Natural Science Foundation of China [50971064]
The initiation, propagation, repassivation of metastable pits of Q345 carbon steel in Cl- containing concrete pore solution were studied by electrochemical noise. The initiation rate of metastable pits increases exponentially up to a constant value with time. After stable pit occurs, the nucleation of metastable pits is mainly induced by the rust layer, and mainly takes place in the outskirt of the rust layer. Stable pits incline to expand horizontally to produce a shallow pit. In addition, high concentration of nitrite can inhibit the nucleation of metastable pits around the rust cover and accelerate the repassivation of stable pits. (C) 2011 Elsevier Ltd. All rights reserved.
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