以建筑工程用8235钢筋为对象,研究了其在混凝土孔隙液中的腐蚀行为,分析了氯离子浓度、溶液pH值以及缓蚀剂对钢筋表面钝化膜的影响。结果表明:随着混凝土孔隙液中氯离子含量的增加和pH值的降低,溶液的极化电阻降低、腐蚀电流密度增大,削弱了钝化膜效果。另外,NaNO2缓蚀剂的加入有效的保护了钝化膜,起到了较好的抗腐蚀效果。 In this paper, the corrosion behavior of 8235 rebar in concrete was studied. The effects of chloride ion concentration, solution pH value and corrosion inhibitor on the surface passivation film of rebar were analyzed. The results show that with the increase of chloride ion content and pH value in the pore fluid, the polarization resistance decreases and the corrosion current density increases, weakening the passivation film effect. In addition, the addition of NaNO2 inhibitor effectively protected the passivation film and played a good anti-corrosion effect.