Abstract

Parts of reinforcing steel bar (rebar) used in concrete are subjected to high levels of plastic strain due to various operations during construction. This work presents the corrosion behavior of pre-strained rebars in simulated concrete pore solution, both in the presence and in the absence of chlorides. Results obtained from the electrochemical tests (EIS and cyclic polarization) in chloride-free pore solutions have indicated the formation of more protective passive films in the strained steels. However, when contaminated with chlorides, the strained steels have exhibited higher corrosion susceptibility due to the changes in the surface condition, microstructure and dislocation density.

中文翻译：

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应变钢筋在模拟混凝土孔隙溶液中的腐蚀行为

摘要

由于施工过程中的各种操作，混凝土中使用的钢筋（钢筋）的零件会承受很高的塑性应变。这项工作提出了在有或没有氯化物的情况下，预应变钢筋在模拟混凝土孔隙溶液中的腐蚀行为。从无氯孔隙溶液中的电化学测试（EIS和循环极化）获得的结果表明，在应变钢中形成了更具保护性的钝化膜。然而，当被氯化物污染时，由于表面条件，微观结构和位错密度的变化，应变钢表现出更高的腐蚀敏感性。