对有无氯离子时混凝土孔溶液中带热轧皮未锈和生锈钢筋的电化学极化行为进行模拟研究。结果表明:在强碱无氯溶液中,带热轧皮未锈和生锈钢筋均具有可钝化性,不过,后者的维钝电流密度通常高于前者。当p H值为10~12.5时,致密的热轧皮对钢筋基底有一定保护作用,当p H值不小于13.5时,热轧皮的化学稳定性下降,保护性能降低。在强碱含氯溶液中,带致密热轧皮的未锈钢筋仍显示出可钝化性,而带热轧皮生锈钢筋则一直处于活化腐蚀状态。 Electrochemical polarization behavior of hot-rolled and un-rusted steel bars in concrete pore solution with or without chloride ions was simulated. The results show that in the alkali-free and chlorine-free solution, the hot-rolled skin rust and rusty steel are passivable, but the latter is usually higher than the former. When the p H value is 10 ~ 12.5, dense hot rolled skin has some protective effect on the steel substrate. When the p H value is not less than 13.5, the chemical stability of the hot rolled skin decreases and the protective performance decreases. In strong base chlorine solution, the stainless steel with dense hot rolled skin still shows passivation, whereas the rusty steel with hot rolled skin is always in the activated corrosion state.