杂散电流-盐卤耦合作用下钢筋混凝土腐蚀行为

发布时间：2018-03-01 01:30

本文关键词： 钢筋混凝土杂散电流盐卤环境腐蚀　出处：《建筑材料学报》2017年03期 　论文类型：期刊论文

【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%.
[Abstract]:Aiming at the harsh service environment under the coupling action of stray current and salt halogen in the western rail transit engineering, The experimental simulation device under the coupling of stray current and salt halogen was designed. The type of steel bar was systematically studied by using linear polarization resistance (LPRP), AC impedance spectroscopy (EIS) and precipitation-potentiometric titration. The effect of key factors such as electrification time and rust inhibitor on the corrosion behavior of steel bar is studied. The results show that the corrosion resistance of smooth circular steel bar in concrete is 2.5 times of that of ribbed steel bar under the coupling of stray current and salt halogen. With the increase of stray current and electrification time, the corrosion resistance of each specimen in salt halogen environment decreased by order of magnitude, and the decrease was the largest in the initial stage of electrification, and the corrosion resistance of the samples under coupling action was greatly improved with the addition of rust inhibitor. Up to 50.
【作者单位】：东南大学江苏省土木工程材料重点实验室;东南大学城市与建筑遗产保护教育部重点实验室;
【基金】：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)
【分类号】：TU528

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