外加交流电场对薄液膜中氧扩散的影响

发布时间：2018-06-13 00:29

本文选题：计时电流法 + 大气腐蚀　；参考：《中国腐蚀与防护学报》2015年06期

【摘要】：采用计时电流法测定了交流电场作用下O_2在薄液膜中的扩散系数。考察了计时电流法测定氧扩散系数这一方法在薄液膜体系和电场环境下应用的可行性,研究了薄液膜体系中液膜厚度以及外加电场对氧扩散系数的影响。结果表明,O的扩散系数随着薄液膜厚度的减小而增大,随着交流电场强度的增强而增大。交流电场对O扩散系数的影响可能是其加速了O通过气/液界面到达电极表面的过程。薄的液膜和强的电场会加快金属腐蚀的阴极过程中O的传输,从而加速金属腐蚀。
[Abstract]:The diffusion coefficient of O _ 2 in thin liquid film was measured by chronoamperometric method. The feasibility of measuring oxygen diffusion coefficient by chronoamperometric method in thin liquid film system and electric field environment was investigated. The effects of liquid film thickness and applied electric field on oxygen diffusion coefficient in thin liquid film system were studied. The results show that the diffusion coefficient of O increases with the decrease of thin liquid film thickness and increases with the increase of AC electric field intensity. The effect of AC field on the diffusion coefficient of O may be due to the acceleration of the process of O reaching the electrode surface through the gas / liquid interface. Thin liquid film and strong electric field can accelerate O transport in the cathodic process of metal corrosion, thus accelerating metal corrosion.
【作者单位】：上海电力学院上海市电力材料防护与新材料重点实验室;上海中挪海事有限公司;
【基金】：国家自然科学基金项目(51271110) 上海市教委科研创新重点项目(12ZZ170)资助
【分类号】：TG174.4

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