Electrochemical derusting in molten Na_(2)CO_(3)–K_(2)CO_(3)  

作　　者：Dong-yang Zhang Xue Ma Hong-wei Xie Xiang Chen Jia-kang Qu Qiu-shi Song Hua-yi Yin 

机构地区：[1]Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education,School of Metallurgy,Northeastern University,Shenyang 110819,China [2]Key Laboratory of Data Analytics and Optimization for Smart Industry of Ministry of Education,Northeastern University,Shenyang 110819,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2021年第4期637-643,共7页矿物冶金与材料学报（英文版）

基　　金：financially supported by the Fundamental Research Funds for the Central Universities (No.N172505002);the National Natural Science Foundation of China (No.51704060);the National Thousand Youth Talent Program of China;the 111 Project (No.B16009)。

摘　　要：The formation of a rust layer on iron and steels surfaces accelerates their degradation and eventually causes material failure.In addition to fabricating a protective layer or using a sacrificial anode, repairing or removing the rust layer is another way to reduce the corrosion rate and extend the lifespans of iron and steels.Herein, an electrochemical healing approach was employed to repair the rust layer in molten Na_(2)CO_(3)-K_(2)CO_(3).The rusty layers on iron rods and screws were electrochemically converted to iron in only several minutes and a metallic luster appeared.Scanning electron microscopy(SEM) and energy dispersive X-ray spectroscopy(EDS) analyses showed that the structures of the rust layer after healing were slightly porous and the oxygen content reached a very low level.Thus, high-temperature molten-salt electrolysis may be an effective way to metalize iron rust of various shapes and structures in a short time, and could be used in the repair of cultural relics and even preparing a three-dimensional porous structures for other applications.

关 键 词：molten salt ELECTRO-DEOXIDATION RUST stainless steel DERUSTING 

分 类 号：TG176[金属学及工艺—金属表面处理]