用电化学方法研究了Cl-、S2-、NO-3、温度以及某电厂水质稳定剂对304不锈钢耐蚀性的影响.极化曲线表明:在[Cl-]/[SO2-4]约为0.56时,点蚀电位开始下降,并随着Cl-浓度的增大逐渐降低;S2-的加入使钝化电流显著增大;NO-3浓度增加使点蚀电位逐渐升高;溶液温度的提高使点蚀电位降低,钝化电流也有所增大,钝化膜的耐蚀性降低;实验表明采用的某厂水质稳定剂可引起304不锈钢点蚀电位的下降.Mott-Schottky图显示S2-浓度的增加使体现p-型半导体(氧化铬)性质的直线段发生较大变化,说明硫离子影响了铬氧化物的性质.
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