采用电化学方法研究了不锈钢1.4529的耐蚀性, 极化曲线结果表明, 随酸度、Cl-和SO42-含量的增大, 不锈钢1.4529的腐蚀电流密度增大, 且Cl-质量浓度越大, 其点蚀电位越低; 1.4529不锈钢在pH=3, Cl-质量浓度为20 g·L-1溶液中的电化学噪声谱结果表明, 其表面发生了点腐蚀, 且在浸泡48 h后, 点蚀由亚稳态转变为稳态。

The corrosion resistance of stainless steel 1.4529 was studied by electrochemical techniques. The polarization curves results indicated that the corrosion current density of stainless steel 1.4529 increased with the contents of acidity, Cl- and SO42- increase. The electrochemical noise spectrum characteristic parameters showed that the higher Cl- concentration, the lower the pitting potential. The surface pitting corrosion was found on 1.452 9 stainless steel. in pH=3, [Cl-]=20 g·L-1 solution. Pitting spots transformed from metastable to stable after immersion for about 48 h.