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中文摘要：
研究了Cr对低合金耐蚀钢筋在饱和Ca（OH）2混凝土模拟液中耐蚀性能的影响机制,为低合金耐蚀钢筋的研发提供理论上的依据。周期浸润腐蚀及循环动电位极化等实验表明,含Cr耐蚀钢筋的腐蚀敏感性及腐蚀速率远低于HRB400钢筋,其耐蚀机理主要表现为：Cr的添加改变了耐蚀钢筋的显微组织,形成大量细小且均匀分布的粒状贝氏体;Cr的添加改变了钢筋表面钝化膜的组成,使得含Cr耐蚀钢筋在混凝土模拟孔隙液中的点蚀电位更高,钝化膜更稳定;含Cr耐蚀钢筋的腐蚀产物中α-FeOOH的含量高于HRB400,进一步改善了钢筋耐蚀性。
英文摘要：
The effect of alloyed Cr on the corrosion behavior of a corrosion-resistant rebar 5Cr steel in simulated concrete pore solutions（saturated Ca（OH）2 solution） with various Cl-contents was investigated. The results showed that the corrosion resistance of 5Cr steel is much better than HRB400 steel, and which may be attributed to the following reasons： the addition of 5%Cr enabled the microstructure of the steel to be refined as bainites dispersed uniformly on ferrites; the passive film formed on 5Cr steel to be modified to exhibita nobler pitting potential in simulated concrete pore solution and to possess a higher content of α-FeOOH in the rust scales, which all lead to the corrosion resistance of 5Cr steel superior to HRB400 steel.
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