X80管线钢钝化膜内点缺陷扩散系数的计算  

Calculation of Diffusivity of Point Defects in Passive film Formed on X80 Pipeline Steel

作　　者：李党国[1] 冯耀荣[2] 白真权[2] 郑茂盛[1] 

机构地区：[1]西安交通大学材料科学与工程学院,西安710049 [2]中国石油天然气集团公司管材研究所

出　　处：《应用化学》2008年第9期1007-1010,共4页Chinese Journal of Applied Chemistry

基　　金：国家重点基础研究发展规划("九七三")项目(G1999065004);国家自然科学基金(50231020)资助项目

摘　　要：应用电容测试法并借助于点缺陷模型(PDM)计算了X80管线钢在模拟土壤环境中所形成的钝化膜内点缺陷的扩散系数,利用实验测得钝化膜的稳态电流和采用PDM对计算结果进行了验证。2种计算方法均得到了点缺陷在X80管线钢钝化膜内的扩散系数约为1×10-17cm2/s数量级。The diffusivity of point defects in the passive film formed on X80 pipeline steel in simulated soil environment was calculated by means of capacitance measurement and point defect model（PDM）. The calculated result was testified by experimental steady current density and PDM. Two calculated results all show that the order of magnitude of diffusivity is about 1×10^-17cm^2/s.

关 键 词：X80管线钢 扩散系数 点缺陷模型 钝化膜 电容测试法 

分 类 号：O646.6[理学—物理化学]