采用电化学阻抗谱(EIS)、动电位极化曲线、循环极化曲线(CP)研究了316L，2205，254SMo和2507不锈钢在含不同浓度Cl-的高炉煤气管道冷凝模拟液中的腐蚀行为。结果表明，随着Cl-浓度的增加，该四种不锈钢电极的电荷转移电阻均逐渐减小，其中2507不锈钢电极的电荷转移电阻最大，其次为254SMo不锈钢，而316L不锈钢的最小。316L不锈钢电极的极化曲线没有钝化区，腐蚀电流密度较大; 254SMo和2507不锈钢电极的极化曲线存在明显的钝化区，显示较好的耐蚀性。254SMo和2507不锈钢电极的循环极化曲线中的折回段几乎沿原曲线逆向变化，显示其表面钝化膜破坏后的修复能力强; 2205不锈钢回扫电流始终大于正扫电流，其钝化膜修复能力相对较差。

Corrosion behaviors of 316L, 2205, 254SMo and 2507 stainless steels(SS) in simulated condensate solution with different concentrations of chloride from blast furnace gas pipeline were studied by electrochemical impedance spectroscopy, potentiodynamic polarization curve and cyclic polarization curve. The results showed that the charge transfer resistance of 316L, 2205, 254SMo and 2507 SS decreased with increasing the concentration of Cl-. 2507 SS had the largest charge transfer resistance and 316L SS had the lowest among these four SS. The polarization curves showed that no passivation region existed and the corrosion current density was very high for 316L SS. Obvious passivation region existed and showed better corrosion resistance for 254SMo and 2507 SS. The returned segment of the cyclic polarization curves of 254SMo and 2507 SS changed reversely along the original ones, indicating the strong repairing ability of the destroyed passive film. However, the reverse scan current of 2205 SS was always larger than its obverse scan current, indicating relatively worse repairing ability of the passivated film.