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通过循环极化曲线、Mott-Schottky曲线以及电化学阻抗谱等方法研究了温度对Cr26Mo1超纯高铬铁素体不锈钢在3.5%NaCl溶液中耐点蚀性能的影响.结果表明:随着温度升高,Cr26Mo1超纯高铬铁素体不锈钢的自腐蚀电位降低,腐蚀电流密度增大,点蚀电位下降,钝化膜阻抗降低.Cr26Mo1不锈钢钝化膜的半导体类型和性质在不同温度下发生改变.Cr26Mo1不锈钢发生点蚀的孕育期随着温度的升高而缩短,点蚀敏感性增加,已发生点蚀的试样不能够自修复.
The effect of temperature on pitting corrosion resistance of Cr26Mo1 ultra-pure and high-chromium ferritic stainless steel in 3.5% NaCl solution was investigated by means of cyclic polarization curve, Mott-Schottky curve and electrochemical impedance spectroscopy. The results show that with the increase of temperature High, Cr26Mo1 ultra-pure high-chromium ferritic stainless steel corrosion potential decreases, the corrosion current density increases, the pitting potential decreases, the passive film impedance decreases .Cr26Mo1 stainless steel passivation film semiconductor type and nature of the change under different temperatures .Cr26Mo1 stainless steel pitting occurs during the incubation period as the temperature shortens, pitting sensitivity increases, pits have occurred in the sample can not be self-healing.