摘要
在硫酸溶液中对不锈钢进行阳极极化曲线的测定表明，铬酸钾在不锈钢表面的还原反应受铬酸根离子在溶液中的扩散步骤所控制，且在不锈钢致钝的电位区间内达到了极限扩散。对不锈钢进行电位滴定的实验结果也证实了铬酸根离子的这一还原行为。
In 0.50mol/l. H2SO4 solutions(30℃,deaerated ), anodic polarization curves of stainless steel indicated that reduction of K2CrO4 on the surface of stainless steel was wholly controlled by diffusion step of CrO42- at passivation polential of stainless steel. Critical passivation concentrations of K2CrO4 for stainless steel determined by potentiomctric titration were consistent with values calculated according to parameters of POlarization curves of stainless sted.
出处
《南京化工大学学报》
1995年第A01期6-9,共4页
Journal of Nanjing University of Chemical Technology(Natural Science Edition)
基金
国家自然科学基金
关键词
铬酸钾
电化学还原
不锈钢
硫酸溶液
缓蚀剂
potassium chromate
diffusion controll
electrochemical reduction
stainless steel
passivation
