Cr合金化对HRB400钢筋腐蚀行为的研究
Corrosion Behavior of Cr Modified HRB400 Steel Rebar in 2%NaCl Solution
朱言晨 李晓刚 刘明 庞靖宇 程学群 刘广华
作者信息
摘要
应用动电位极化、电化学阻抗谱、周浸腐蚀实验的方法研究了HRB400普通碳钢钢筋和两种Cr合金化的低合金钢筋在2%NaCl溶液中的腐蚀行为。结果表明：相比HRB400钢筋，Cr合金化的钢筋的开路电位明显正移，Cr加入提高了钢的热力学稳定性；随着Cr含量的增加，钢筋的自腐蚀电流密度减小，极化电阻增大，Cr合金化的钢筋具有相对较小的电化学腐蚀速率；周浸加速腐蚀72h后，HRB400钢筋以均匀腐蚀为主，Cr合金化的钢筋以局部腐蚀为主，添加Cr可以显著降低HRB400钢筋的均匀腐蚀速率。
Abstract
Corrosion behavior of the Cr modified HRB400 carbon steel rebar in 2%NaCl solution was investigated by means of dry/wet cyclic corrosion test, potentiodynamic polarization and electrochemical impedance spectroscopy. Results show that the open circuit potential moved to higher value in positive direction; the corrosion current density decreased; the polarization resistance increased and the corrosion rate declined for the Cr modified steel in comparison to HRB400 steel. After dry/wet cyclic corrosion test for 72 h, the HRB400 steel exhibited an uniform corrosion morphology, however the Cr modified steel rebar exhibited features of local corrosion. Anyhow, the addition of Cr can significantly reduce the uniform corrosion rate of HRB400 steel rebar.关键词
Cr合金化/开路电位/极化曲线/电化学阻抗谱/腐蚀速率引用本文复制引用
朱言晨,李晓刚,刘明,庞靖宇,程学群,刘广华.Cr合金化对HRB400钢筋腐蚀行为的研究[EB/OL].(2023-03-31)[2026-04-01].https://chinaxiv.org/abs/202303.10582.学科分类
冶金技术/金属学、热处理/钢铁冶炼
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