防锈油膜在5% Na_2SO_4溶液中的半导体导电行为  

SEMI-CONDUCTIVE BEHAVIOR OF RUST PREVENTIVE OIL COATING IN 5% Na_2SO_4 SOLUTION DURING ITS DEGRADATION

作　　者：钟庆东[1] 郑金[1,2] 徐乃欣[3] 印仁和[2] 周国定[1] 

机构地区：[1]上海电力学院电化学研究室,国家电力公司热力设备腐蚀与防护(部级)重点实验室 [2]上海大学化学系,上海200436 [3]中国科学院上海微系统及信息技术研究所

出　　处：《腐蚀科学与防护技术》2004年第5期276-279,共4页Corrosion Science and Protection Technology

基　　金：上海市教育委员会"曙光"计划 ( 0 1SG0 43 );上海市科委纳米专项 ( 0 3 5 2NM 0 2 8);上海市教育委员会"电厂热能动力与环境工程"重点学科项目资助

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防锈油膜在 5 %Na2 SO4溶液中失效过程的导电机制转变行为 .防锈油膜在 5 %Na2 SO4溶液中的失效过程存在半导体导电特征 ,随着浸泡时间的延长 ,防锈油膜从浸泡初期的p型半导体转变为n型半导体 ,转变过程中 ,防锈油膜中出现两个空间电荷过渡层 .随着浸泡时间的延长 ,防锈油膜中的空间电荷层厚度皆逐渐减小 ,载流子密度则逐渐增加 ,并且计算了不同转变时期防锈油膜中的电子给体 (ND)和电子受体 (NA)In this paper,conducting transformation of rust preventive oil coating in 5% Na 2SO 4 solution under corrosion potential was studied by utilizing potential capacitance method and Mott Schottky analysis.It was pointed out that there existed semiconducting behaviour of rust preventive oil coating during its degradation in 5% Na 2SO 4 solution.With increasing of immersion time,rust preventive oil coating transformed from p type semiconductor at the early stage of immersion to n type semiconductor,two reverse space charge layers gradually formed in the rust preventive oil coating.The thickness of space charge layers in the oil coating decreased along with immersion time,however,the density of charge carriers in the oil coating increased with increasing immersion time.ND and NA of oil coating in different transition process were also calculated.

关 键 词：防锈油 NA2SO4 自腐蚀电位 油膜 N型半导体 过渡层 导电机制 行为 初期 层厚 

分 类 号：TQ649.4[化学工程—精细化工] TG174[金属学及工艺—金属表面处理]