文成;田玉琬;王贵;胡杰珍;

• 1:广东海洋大学机械与动力工程学院//广东省海洋装备及制造工程技术研究中心

摘要(Abstract)：

【目的】钢筋的氯致腐蚀问题是限制海工混凝土结构耐久性的主要因素，本研究旨在探索钢筋在氯离子环境中的真实腐蚀机理，为海工混凝土耐久性评估提供理论基础。【方法】设计新型微溶液电解池，模拟海工混凝土微孔隙环境，采用循环伏安、极化曲线和交流阻抗谱方法研究该环境中钢筋的腐蚀速率和电化学规律，并与传统本体溶液、实际混凝土结构中的钢筋腐蚀作对比。【结果】微溶液和本体溶液中钢筋的腐蚀热力学行为一致；溶液体积大于1 mL时钢筋腐蚀动力学行为变化不大，但溶液体积低至100μL后钢筋腐蚀速率大幅下降；微溶液中钢筋溶出的Fe2+离子相对较多，导致阳极反应的平衡电极电位正移、阳极极化阻滞作用加强，腐蚀速率下降。【结论】传统本体溶液电化学测试方法评估钢筋腐蚀速率时出现过评估，而新型微溶液电解池与实际钢筋腐蚀动力学相关性更好。

关键词(KeyWords)： 钢筋;腐蚀速率;孔隙;微溶液;电化学

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（51801033）

作者(Authors): 文成;田玉琬;王贵;胡杰珍;

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