期刊
CORROSION SCIENCE
卷 53, 期 4, 页码 1304-1311出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2010.12.030
关键词
Steel reinforced concrete; EIS; XPS; Effects of strain; Repassivation
资金
- National Natural Science Foundation of China [50731004]
The influence of stress on passive behaviour of steel bars in concrete pore solution was studied with electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy. The passive ability of steel decreased as the applied load increased and higher load had much greater influence on passivation than repeated loading of small magnitude. A micro-crack model was presented to explain the damage of passive layer by loads. Lower load caused micro-cracks in the passive film which might be completely recovered after unloading. Under higher load more micro-cracks were produced in the passive film and some may penetrate the film, leading to irreversible damages. (C) 2011 Elsevier Ltd. All rights reserved.
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