Electrochemical derusting in molten Na2CO3–K2CO3
来源期刊：International Journal of Minerals Metallurgy and Materials2021年第4期
论文作者：Dong-yang Zhang Xue Ma Hong-wei Xie Xiang Chen Jia-kang Qu Qiu-shi Song Hua-yi Yin
文章页码：637 - 643
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 Na2CO3-K2CO3.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.
Dong-yang Zhang1，Xue Ma1，Hong-wei Xie1，Xiang Chen1，Jia-kang Qu1，Qiu-shi Song1，Hua-yi Yin1,2
1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education, School of Metallurgy, Northeastern University2. Key Laboratory of Data Analytics and Optimization for Smart Industry of Ministry of Education, Northeastern University
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 Na2CO3-K2CO3.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.
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