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两种表面状态钢筋在氯盐环境下的腐蚀特征
Corrosion Characteristics of Two Kinds of Surface of Steel Bars in Chloride Environment
投稿时间:2018-06-05  修订日期:2018-08-14
DOI:103969/j.issn.1007 9629201902014
中文关键词:  钢筋锈蚀  电化学测试  显微观测  表面状态
英文关键词:steel bar corrosion  electrochemical testing  microscopic observation  surface state
基金项目:国家自然科学基金资助项目(51379111)
              
作者单位
徐港
XU Gang
三峡大学防灾减灾湖北省重点实验室,湖北宜昌443002
Hubei Key Laboratory of Disaster Prevention and Mitigation, China Three Gorges University, Yichang 443002, China
杨泽稳
YANG Zewen
三峡大学防灾减灾湖北省重点实验室,湖北宜昌443002
Hubei Key Laboratory of Disaster Prevention and Mitigation, China Three Gorges University, Yichang 443002, China
张瑞
ZHANG Rui
三峡大学防灾减灾湖北省重点实验室,湖北宜昌443002
Hubei Key Laboratory of Disaster Prevention and Mitigation, China Three Gorges University, Yichang 443002, China
王青
WANG Qing
三峡大学防灾减灾湖北省重点实验室,湖北宜昌443002
Hubei Key Laboratory of Disaster Prevention and Mitigation, China Three Gorges University, Yichang 443002, China
曾臻
ZENG Zhen
三峡大学防灾减灾湖北省重点实验室,湖北宜昌443002
Hubei Key Laboratory of Disaster Prevention and Mitigation, China Three Gorges University, Yichang 443002, China
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中文摘要:
      采用电化学测试方法并结合显微观测技术,对混凝土模拟孔隙液中2种表面状态钢筋试件进行阳极极化试验,研究在不同氯离子浓度环境下钢筋锈蚀的变化过程.结果表明:在混凝土模拟孔隙液中无氧化皮裸筋与带氧化皮钢筋均能发生钝化,且钝化膜稳定性随氯离子浓度上升而变差,带氧化皮钢筋较无氧化皮裸筋的钝化膜更易破坏;同等氯离子浓度下,带氧化皮钢筋维钝电流较无氧化皮裸筋约大1个数量级,腐蚀更为严重.
英文摘要:
      The electrochemical technique combined with microscopic observation was used to study the anodic polarization of two kinds of steel bar specimens with different surface states in the simulated concrete pore solution, and the change process of corrosion of steel bars under different chloride ion concentrations. The results show that both steel bar without oxide skin and steel bar with oxide skin can passivate in the simulated concrete pore solution, and the stability of the passivation film becomes worse with increasing chloride ion concentration, and the steel bar with oxide skin is more vulnerable to the passivation film. With the same chloride ion concentration, the blunt current of the steel bar with oxide skin is about one order of magnitude larger than that of the steel bar without oxide skin, the corrosion of the steel bar with oxide skin is more serious.
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