硫酸介质中卤素离子对201Cu不锈钢电化学腐蚀行为的影响  

Effect of Halide Ions to Electrochemical Corrosion Behavior of 201Cu Stainless Steel in Sulfuric Acid Medium

作　　者：李文娟[1] 朱瑞涛[1] 郑慧敏[1] 刘翠萍[2] 

机构地区：[1]太原师范学院化学系,山西太原030031 [2]山西大学学术期刊社,山西太原030006

出　　处：《山西大学学报（自然科学版）》2013年第4期609-614,共6页Journal of Shanxi University(Natural Science Edition)

基　　金：国家创新型中小企业技术创新基金创新项目(07C26211400112)

摘　　要：文章以不同浓度的卤素离子作为活性阴离子,在2.5mol/L的硫酸溶液中对201Cu不锈钢电化学过程进行了研究,并用软硬酸碱(HSAB)理论与配合物稳定常数讨论了实验结果.结果表明:在所研究的溶液浓度范围内,Cl-、Br-和I-对201Cu不锈钢的活性溶解具有一定的抑制作用,作用大小为I->Br->Cl-,而F-却起到加速作用;Cl-严重影响201Cu不锈钢的钝化电流密度,F-影响其二次钝化电流密度.这些差异均与卤素离子的结构与性质有关.The electrochemical corrosion behavior of 201Cu stainless steel was investigated in 2.5 mol/L-a sulfuric acid solution with different concentrations halide ions （F- ,Cl- ,Br- ,I- ） as active anionic. The ex- perimental results were discussed with the HSAB theory and the stability constants of complex. The re- sults showed that active corrosion of on 201Cu stainless steel was inhibited by Cl- .Br- and I- ,and the in- hibition efficiency increased successively, however, the active corrosion was accelerated by F-. The passiva- tion of 201Cu stainless steel was affected by Cl- obviously, second passivation was affected by F-. The differences are related to the structure and character of halide ions.

关 键 词：卤素离子 201Cu不锈钢 硫酸 极化曲线 二次致钝电流密度 

分 类 号：O646.6[理学—物理化学]