Galvanic Corrosion Behavior of Copper-Drawn Steel for Grounding Grids in the Acidic Red Soil Simulated Solution  

作　　者：Xiao-Lei Fan Yun-Xiang Chen Jun-Xi Zhang De-Yuan Lin Xuan-Xuan Liu Xiao-Jian Xia 

机构地区：[1]Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power,Shanghai University of Electric Power,Shanghai 200090,China [2]Electric Power Research Institute of State Grid Fujian Electric Power Company Limited,Fuzhou 350007,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2020年第11期1571-1582,共12页金属学报（英文版）

基　　金：financially supported by the Science and Technology Commission of Shanghai Municipality(No.19DZ2271100)。

摘　　要：The influence of pH and metallographic structure on the corrosion behavior of copper-drawn steel is studied with the simulated system.The effect of pH on the corrosion behavior of copper-drawn steel has been investigated using open-circuit potential,potentiodynamic polarization,galvanic current measurement,scanning electron microscopy and scanning vibrating electrode technique techniques.The steel is corroded as anode,while the corrosion of copper plate is protected as cathode.All the results revealed that pH and metallographic structure had a significant influence on the corrosion behavior of copper-drawn steel.With the decrease in pH value from 6 to 2.4,the corrosion rate of copper-drawn steel galvanic couple(Cu-Fe GC)obviously increased in the simulated solution of acidic red soil.The electric field formed by the Cu-Fe GC changes the direction of ion migration between the copper and drawn steel electrodes,which impacts the composition and microstructure of corrosion products formed on the electrode surface.

关 键 词：Cu-Fe galvanic couple Electrochemical test Scanning vibrating electrode technique(SVET)measurement Soil corrosion 

分 类 号：TM63[电气工程—电力系统及自动化] TG172[金属学及工艺—金属表面处理]