Study on the Corrosion Behavior of Reinforcing Steel by Electrochemical Techniques and XPS

被引：3

作者：

Zhu, Yan-Feng ^{[1
]}

Du, Rong-Gui ^{[1
]}

Chen, Wen ^{[1
]}

Hu, Rong-Gang ^{[1
]}

Shi, Hai-Yan ^{[1
]}

Guo, Ya ^{[1
]}

Wang, Xiao-Ping ^{[1
]}

Lin, Chang-Jian ^{[1
]}

机构：

[1] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Fujian, Peoples R China

来源：

CORROSION POSTERS (GENERAL) - 220TH ECS MEETING | 2012年 / 41卷 / 24期

关键词：

CONCRETE PORE SOLUTION; STAINLESS-STEEL; PASSIVE FILM; MILD-STEEL; IRON; SPECTROSCOPY; SURFACES; LAYER; ACID; SEM;

D O I：

10.1149/1.3692437

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Reinforcing steel in concrete is protected from corrosion due to the formation of a passive film on its surface. The steel passivity depends on the physical and chemical conditions in its environment. In this work, the effect of pH values, Cl- concentrations on the corrosion behavior of reinforcing steel in the simulated concrete pore solutions have been studied by electrochemical techniques and X-ray photoelectron spectroscopy. The results indicated that the corrosion potential of the steel shifted negatively and its corrosion current density rose with the Cl- concentration increasing and pH decreasing in the solution. The passive film of the steel was mainly composed of Fe-oxides. When the Cl- concentration reached 0.6 M or pH decreased to 11.3, the steel passivity was destroyed, the Fe2+ atomic percentage of the steel surface film increased and the Fe3+ content decreased.

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收藏

页码：71 / 79

页数：9

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