中文摘要：

为了明晰在杂散电流与氯离子耦合作用下,钢纤维在水泥基材料中的腐蚀规律,在砂浆中埋置单根钢纤维,采用恒电流试验、线性极化试验和ESEM微观测试,研究了外加电流与钢纤维中杂散电流的关系,钢纤维锈蚀的启动电势差,钢纤维的极化电阻,钢纤维锈蚀的微观形貌,以及杂散电流作用下砂浆力学性能的劣化规律。结果表明：杂散电流与氯离子耦合作用下,外加电流与杂散电流的大小成正比,与钢纤维腐蚀电位和极化电阻成反比;外加电流强度和钢纤维电势差均存在阈值,低于阈值,钢纤维中无杂散电流通过。

英文摘要：

In order to investigate the coupling effects of stray current and chloride ion on steel fiber corrosion in cement based materials, constant current test, linear polarization technique and ESEM microscopic testing were adopted in this research, The relationship between the applied current and the current picked up by the fibers, driving potential difference, polarization resistance, steel fiber morphology of corrosion products and deterioration of the mechanical properties of mortar were studied. The results show that with combined effect of stray current and chloride ion, intensity of stray current was proportional to the applied current, steel fibers corrosion potential and polarization resistance are inversely proportional to those of the applied current. There are thresholds for applied current intensity and potential difference to initiate stray current in steel fibers.