碳钢及环氧清漆在不同溶液中的半导体导电行为  

Semiconducting Behavior of Carbon Steel and Epoxyresin Varnish in Different Solutions

作　　者：钟庆东[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《腐蚀与防护》2009年第11期778-783,796,共7页Corrosion & 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(No.NCET-07-0536);教育部创新团队计划(No.IRT0739)项目资助

摘　　要：采用电位-电容法结合Mott-Schottky分析技术研究了自腐蚀电位条件下20号碳钢及涂层体系在酸、碱和盐溶液中的半导体导电行为。结果表明,在不同的腐蚀溶液中,随着时间和扫描电位的增加,20号钢空间电荷层电容(Capacitance of space charge layer,Csc)变化规律不同。20号碳钢在5%硫酸溶液和5%硫酸钠溶液中呈现p型半导体导电特征,而在5%氢氧化钠溶液中,20号钢表面形成了两个空间电荷层结构,呈n型半导体特征。环氧清漆在不同电解质溶液中也表现出半导体导电特征,出现由绝缘态向半导体态转变的现象。The semiconducting behavior of 20 carbon steel in acid, alkali and salt solutions was studied by utilizing potential-capacitance and Mott-Schottky analysis methods. The results showed that the capacitance variation of space charge layer of 20 carbon steel in different solutions methods was different. The carbon steel showed p-type semiconducting behavior in 5% sulfuric acid and 5% sodium sulfate solution. However, the carbon steel showed n- type semieonducting behavior in 5 % sodium hydroxide and formed two space charge layers. The epoxy resin varnish showed semiconducting behavior in different electrolyte solutions and exhihitea transformation from insulating state to semiconducting state.

关 键 词：碳钢 导电机制 P型半导体 N型半导体 

分 类 号：TG174.36[金属学及工艺—金属表面处理] TG174.46[金属学及工艺—金属学]