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杂散电流盐卤耦合作用下钢筋混凝土腐蚀行为
Corrosion Behavior of Reinforced Concrete under Stray Current Brine Coupling Effects
投稿时间:2016-04-06  修订日期:2016-05-11
DOI:10.3969/j.issn.1007 9629.2017.03.022
中文关键词:  钢筋混凝土  杂散电流  盐卤环境  腐蚀
英文关键词:reinforced concrete  stray current  brine environment  corrosion
基金项目:国家自然科学基金资助项目(51378116,51178106);城市与建筑遗产保护教育部重点实验室开放基金资助项目(KUAL1607)
           
作者单位
张云升
ZHANG Yunsheng
东南大学江苏省土木工程材料重点实验室,江苏南京211189
Jiangsu Key Laboratory for Civil Engineering Materials, Southeast University, Nanjing 211189, China
黄冉
HUANG Ran
东南大学江苏省土木工程材料重点实验室,江苏南京211189
Jiangsu Key Laboratory for Civil Engineering Materials, Southeast University, Nanjing 211189, China
杨永敢
YANG Yonggan
东南大学江苏省土木工程材料重点实验室,江苏南京211189
Jiangsu Key Laboratory for Civil Engineering Materials, Southeast University, Nanjing 211189, China
刘国建
LIU Guojian
东南大学江苏省土木工程材料重点实验室,江苏南京211189
Jiangsu Key Laboratory for Civil Engineering Materials, Southeast University, Nanjing 211189, China
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中文摘要:
      针对西部地区轨道交通工程中杂散电流盐卤耦合作用下的严酷服役环境,设计了杂散电流盐卤耦合作用下的试验模拟装置并采用线性极化电阻(LPR)、交流阻抗谱(EIS)以及沉淀电位滴定等试验方法,系统研究了钢筋类型、通电时间和阻锈剂等关键因素对钢筋腐蚀行为的影响规律.结果表明:在杂散电流盐卤耦合作用下,混凝土中光圆钢筋的耐蚀性能是肋纹钢筋的2.5倍;随着杂散电流通电时间的增加,盐卤环境中各试件的耐蚀性能均呈现数量级下降,且在通电初始阶段下降幅度最大;阻锈剂的加入可使耦合作用下的试件耐蚀性能大幅度提高,最高可达50%.
英文摘要:
      Based on the harsh service environment under stray current and brine coupling effects of the west region rail transport engineering, a simulation device considering stray current and brine coupling effect was designed, linear polarization resistance(LPR), electrochemical impedance spectroscopy(EIS) and precipitation potentiometric method were used to investigate the influence of key factors such as rebar type, power on time and corrosion inhibitor on steel corrosion. The results show that the plain rebars corrosion resistance is 2.5 times that of ribbed rebars in concrete under stray current and brine coupling effects; in brine all the specimens corrosion resistance is reduced by orders of magnitudes as the power on time increases and depictes sharp reduction in the initial stage; under stray current and brine coupling effects the corrosion inhibitor can also improves corrosion resistance by a large margin, and the highest rate of increase is up to 50%.
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