腐蚀电化学测量中溶液电阻的补偿
SOLUTION RESISTANCE EQUALIZATION IN CORROSION ELECTROCHEMISTRY MEASUREMENTS
摘 要
从测量仪器、测量方法、测量范围区间以及测量结果的数值修正等几方面介绍了在腐蚀电化学测量中如何消除工作电极与鲁金毛细管间溶液电阻的影响,在实际测试过程中应该根据实际情况来选择合适的方法.在进行数值修正的时候要注意：不论是利用等距离法计算的结果还是利用EIS测量的结果,总是有一定的适用范围,特别是在强极化区,其溶液电阻由于溶液中离子运动速度的增加以及电极表面附近离子浓度的变化而减小.因而利用EIS结果及等距离法计算出的溶液电阻Rsol在相应的电位范围内是适用的,而不能将其推广到整个极化测量区间,否则将会引起较大的误差.
极化曲线
等距离法
电化学阻抗谱
Solution resistance
Polarization curve
Equidistance
EIS
Abstract
Several methods such as selection of apparatus,measurement methods,appropriate polarization range and data amending for eliminating the effect of the resistance between work electrode and Luggin capillary in electrochemical measurement are introduced.It should be pointed out that the results of equidistance calculation or EIS measurement should only be used in a limited scope,and couldn’t be extended to the whole range of the measurement.Normally,in strong polarization region,because the shifting of the ion concentration near the electrode surface occurs and the movement speed of ions is much faster due to the effect of the electric field,solution resistance is less than the resistance at the corrosion potential.
中图分类号 TG174.3+6
所属栏目 试验研究
基金项目 国家自然科学基金重大项目(No.5049933);科技部国家科学基础条件平台建设项目(No.2005DKA10400)
收稿日期 2007/4/27
修改稿日期 2007/5/22
网络出版日期
作者单位点击查看
引用该论文: NIE Xiang-hui,DU Cui-wei,LI Xiao-gang. SOLUTION RESISTANCE EQUALIZATION IN CORROSION ELECTROCHEMISTRY MEASUREMENTS[J]. Corrosion & Protection, 2007, 28(12): 603～606
被引情况:
【1】关鲁雄,赵维, "新型无毒发黑膜的耐腐蚀性能",腐蚀与防护 31, 65-67(2010)
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参考文献
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【2】Kouril M,Novak P,Boiko M.Limitations of the linear polarization method to determine stainless steel corrosion rate in concrete environment[J].Cement and Concrete Composites,2006,28(3):220-225.
【3】Jung Gu Kim,Yong Wook Kim.Cathodic protection criteria of thermally insulated pipeline in soil[J].Corrosion Science,2001,43(10):2011-2021.
【4】吴荫顺,方 智,何积铨,等.腐蚀试验方法与防腐蚀检测技术[M].北京:化学工业出版,29-59.
【5】宋诗哲.腐蚀电化学研究方法[M].北京:化学工业出版社,1988:100-124.
【6】魏宝明.金属腐蚀理论及应用[M].北京:化学工业出版社,2001:65-77.
【7】Mansfeld F.Tafel slopes and corrosion rates obtained in the pre-Tafel region of polarization curves[J].Corrosion Science,2005,47(12):3178-3186.
【8】曹楚南.腐蚀电化学原理(第二版)[M].北京:化学工业出版社,2004:143-150.
【9】Rocchini G,Rocchini L.The influence of the ohmic drop on the shape of polarization curves[J].Corrosion Prevention and Control,2005,53(3):89-91.
【10】Moutarlier V,Gigandet M.EIS characterisation of anodic films formed on 2024 aluminium alloy,in sulphuric acid containing molybdate or permanganate species[J].Corrosion Science,2005,47(4):937-951.
【11】Barranco V,Feliu S.EIS study of the corrosion behaviour of zinc-based coatings on steel in quiescent 3% NaCl solution.Part 2:coatings covered with an inhibitor-containing lacquer[J].Corrosion Science,2004,46(9):2221-2240.
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