Technical note:: Crevice effect on corrosion of steel in simulated concrete pore solutions

被引：11
作者：
Sagüés, AA
Li, L
Pickering, HW
机构：
[1] Univ S Florida, Dept Civil & Environm Engn, Tampa, FL 33620 USA
[2] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
来源：
CORROSION | 2000年 / 56卷 / 10期
关键词：
chloride; concrete; crevice corrosion; epoxy; polarization; rebar; steel;
D O I：
10.5006/1.3294387
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Effect of a crevice on the breakdown potentials (E-b) of carbon steel specimens in pH 12.6 saturated calcium hydroxide (Ca[OH](2)) solution (SCS) and pH 13.6 simulated concrete pore solution (SPS) with 0.01 M to 1.0 M chloride concentration ([Cl-=]) was studied with potentiodynamic polarization. The presence of a crevice substantially lowered (by similar to 0.2 V) the Eb in SCS when [Cl-] greater than or equal to 0.1 M. In SPS, passive film breakdown did not take place up to the oxygen evolution potential (OEP) in the absence of a crevice. However, corrosion developed in the crevice at potentials similar to 0.5 V below the OEP when a crevice was introduced and [Cl-] greater than or equal to 0.1 M.
引用
收藏
页码：979 / 982
页数：4
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