不同电解质溶液对Ni腐蚀行为的影响  

Effects of Different Electrolyte Solution on the Electrochemical Corrosion Behavior of Ni

作　　者：冯春梁[1] 马爱莲[1] 

机构地区：[1]辽宁师范大学化学化工学院功能材料化学研究所,辽宁大连116029

出　　处：《辽宁师范大学学报（自然科学版）》2006年第2期200-203,共4页Journal of Liaoning Normal University:Natural Science Edition

基　　金：辽宁省自然科学基金项目(99102004);辽宁师范大学科研基金资助项目(2003009)

摘　　要：分别对不同酸度、离子强度、离子迁移速率的电解质溶液中镍电极的电化学腐蚀行为进行了测定,并研究了酸性溶液中氯离子对镍电极溶解、钝化、孔蚀等过程的影响.实验表明,提高溶液酸度和离子强度,都会加大金属镍的腐蚀速率,对金属卤化物而言,阳离子迁移速率越小的溶液对金属的腐蚀越严重,在0.1 mol/L硫酸溶液中,氯离子的含量超过0.03 mol/L时,就会有明显的孔蚀现象发生.The electrochemical corrosion behavior of nickel in different cases of electrolyte solution was investigated on acidity, ionic strength and ionic mobility. The chloride ion participation in the dissolution process on nickel electrodes in acid media as well as in the formation of the passive layer and in the pitting corrosion induction were studied by electrochemical method. Tests proved that the increasing of acidity or ionic strength would cause the raise of corrosion rate. For halide salt, metal corrosion would be aggravated in the solution with smaller mobility of cation. Experiments in 0.1 mol/L sulfuric acid indicated that the destruction of the passivity and appearance of localized corrosion would be visible when the concentration of chloride ion was more than 0.03 mol/L.

关 键 词：钝化 镍 电化学腐蚀 孔蚀 循环伏安曲线 

分 类 号：O646.6[理学—物理化学]