| 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%. |
| 关键词: 钢筋混凝土 杂散电流 盐卤环境 腐蚀 |
| DOI：10.3969/j.issn.1007 9629.2017.03.022 |
| 分类号: |
| 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） |
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| Corrosion Behavior of Reinforced Concrete under Stray Current Brine Coupling Effects |
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ZHANG Yunsheng, HUANG Ran, YANG Yonggan, LIU Guojian
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Jiangsu Key Laboratory for Civil Engineering Materials, Southeast University, Nanjing 211189, China
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| Abstract: |
| 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%. |
| Key words: reinforced concrete stray current brine environment corrosion |
