Study on interaction between macrocell and microcell in the early corrosion process of reinforcing steel in concrete  

作　　者：LI LanQiang1,DONG ShiGang1,WANG Wei2,HU RongGang1,DU RongGui1,LIN ChangJian1,ZHUO XiangDong1 & WANG Jia2 1 State Key Laboratory of Physical Chemistry of Solid Surfaces,Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China 2 College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China 

出　　处：《Science China(Technological Sciences)》2010年第5期1285-1289,共5页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.50731004);the Technology Support Programs of China (Grant No.2007BAB27B04)

摘　　要：An array electrode technique was developed as a novel electrochemical method for studying the interaction between macrocell and microcell in the early corrosion process of reinforcing steel in cement mortar.The corrosion potential and galvanic current of macrocell corrosion of the reinforcing steel in cement mortar were imaged by the array electrode technique during the corrosion initiation and propagation.It was certified that the corrosion macrocell current is closely related with the difference of corrosion potential between the anodic and cathodic areas.The corrosion macrocell and microcell always exist during the corrosion process.The interaction of corrosion macrocell and corrosion microcell of steel in concrete was directly sensed by the array electrode for the first time,and was discussed in terms of corrosion electrochemistry.An array electrode technique was developed as a novel electrochemical method for studying the interaction between macrocell and microcell in the early corrosion process of reinforcing steel in cement mortar.The corrosion potential and galvanic current of macrocell corrosion of the reinforcing steel in cement mortar were imaged by the array electrode technique during the corrosion initiation and propagation.It was certified that the corrosion macrocell current is closely related with the difference of corrosion potential between the anodic and cathodic areas.The corrosion macrocell and microcell always exist during the corrosion process.The interaction of corrosion macrocell and corrosion microcell of steel in concrete was directly sensed by the array electrode for the first time,and was discussed in terms of corrosion electrochemistry.

关 键 词：reinforcing steel in CONCRETE ARRAY ELECTRODE MACROCELL MICROCELL 

分 类 号：TU375[建筑科学—结构工程]