摘要
将掺杂态聚苯胺(PANI)制备成单独的PANI膜电极,研究了该电极在敞开、除氧条件下,在酸性介质中的性质及其与2Cr13不锈钢的电化学偶合行为.结果发现无论是在有氧还是除氧条件下,PANI膜与2Cr13不锈钢以面积比1∶1偶合时,PANI均能使2Cr13不锈钢稳定钝化.根据电化学实验及光电子能谱(XPS)表征结果,提出了掺杂态PANI对2Cr13不锈钢的防腐蚀作用来自伽伐尼阳极保护作用,PANI膜在酸性溶液中通过交替电化学脱杂与掺杂为金属钝化提供了必须的阳极电流.
In this work, a separate doped PANI （polyaniline） film electrode has been made. The electrochemical behaviors of the PANI film electrode, and the galvanic interactions between the PANI film electrode and 2Cr13 stainless steel in no-deaerated and N2-deaerated acidic solution have been also studied. The results show that PANI film can passivate 2Cr13 stainless steel both in the N2 deaerated and no deaer ated solution. Based on the experimental results of the electrochemistry and X ray photoelectron spectroscopy （XPS）, a mechanism for galvanic anodic protection for the passivation of 2Cr13 stainless steel has been proposed, the excess oxidative charge stored in the PANI and the ＂dedoping/re-doping process＂ of the doped PANI in the acid environment provides the required anodic current for steel passlvation.
出处
《武汉大学学报（理学版）》
CAS
CSCD
北大核心
2006年第2期154-158,共5页
Journal of Wuhan University:Natural Science Edition
基金
国家自然科学基金资助项目(5027104950471027)
关键词
聚苯胺
不锈钢
电化学偶合
钝化
机理
polyaniline
stainless steel
galvanic coupling
passivation
mechanism
