【摘要】 采用实验室加速腐蚀试验、电化学测量技术研究了不同表面状态下钢筋的腐蚀行为。结果表明:表面带有氧化皮的钢筋的腐蚀行为明显区别于裸表面钢筋。在气相加速腐蚀试验中,裸表面钢筋比氧化皮钢筋有较大的腐蚀失重量;在混凝土模拟孔隙液中,带氧化皮钢筋和端面钢筋(裸钢筋)一样可以在高碱性环境中完全钝化,但随着溶液中Cl-含量上升,钢筋裸表面的钝化膜更易受到破坏,氧化皮钢筋相对端面钢筋维钝电流密度明显减小,破裂电位明显正移,表现出较好的抗Cl-性能。更多还原

【Abstract】 The corrosion behavior of rebars with different surface states was studied by electrochemical technique and accelerated atmospheric corrosion tests.The reinforcing steel with different surface states had different corrosion characteristics.In the accelerated laboratory tests,the steel with oxide skin had larger corrosion weight loss than the steel with nude surface.In the simulated concrete solutions with no salt,both steels were protected.When the concentration of NaCl increased,the corrosion behavior of the steel varied considerably,and the corrosion rate increased,however,the steel with oxide skin showed better corrosion resistance than the steel with nude surface.更多还原