304不锈钢钝化膜在不同溶液中的半导体导电行为  

SEMICONDUCTING BEHAVIOR OF 304 STAINLESS STEEL IN ELECTROLYTE SOLUTION

作　　者：钟庆东[1,2] 王超[1] 鲁雄刚[1] M．Rohwerder 周国治[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072 [2]上海电力学院环境工程系,上海200090 [3]Max-Planck-Institut fur Eisenforschung, Dusseldorf, 40237 Germany

出　　处：《中国腐蚀与防护学报》2008年第6期341-344,共4页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(50571059,50615024);教育部新世纪优秀人才支持计划(07-536);教育部创新团队计划(IRT0739);上海市人才发展资金(2008039)资助

摘　　要：采用电位-电容法及Mott-Schottky分析技术研究了自腐蚀电位条件下304不锈钢钝化膜在酸、碱性溶液中的半导体导电行为。研究表明,304不锈钢钝化膜在不同溶液体系中表现出不同的导电特征,在5‰H2SO4溶液中,呈现两个空间电荷层,扫描电位低于0VSCE,钝化膜呈现p型半导体导电特征。而扫描电位大于0VSCE,钝化膜呈现n型半导体导电特征。钝化膜在5%NaOH溶液中呈现p型半导体导电特征。在不同溶液中载流子浓度随着浸泡时间的延长变化不大。The semiconducting behavior of 304 stainless steel in acid and base solution was studied by utilizing potential-capacitance and Mott-Schottky analysis. It was pointed out that conducting behaviour of 304 stainless steel in different solution was different. The stainless steel showed double layer of space charge layer in 5%0 sulfuric acid, below 0 VSCE, the steel electrode showed p-type semiconducting behaviour, above 0 VSCE, the steel electrode showed n-type semiconducting behaviour. However, in 5% sodium hydroxide, the electrode showed ptype semiconducting behaviour.With increasing immersion time, the density of charge carriers in different solution changed slightly.

关 键 词：304不锈钢钝化膜 导电机制 P型半导体 N型半导体 

分 类 号：TG174.48[金属学及工艺—金属表面处理]