Cite this article as:

Research Article

Electrochemical derusting in molten Na2CO3-K2CO3

+ Author Affiliations
  • Received: 27 December 2019Revised: 12 April 2020Accepted: 13 April 2020Available online: 16 April 2020
  • The formation of a rust layer on the surface of iron and steels accelerates their degradation and eventually causes the failure of materials. 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 lifespan of iron and steels. Herein, an electrochemical deoxidation approach is employed to repair the rust layer in molten Na2CO3-K2CO3. The rust consists of oxides which can be electrochemically reduced to metals/alloys, releasing oxide ions into the molten salt. The electrochemical method uses electrons to convert oxide to metal rather than remove the entire rust layer away. Due to the fluidity of the molten salt electrolyte, the electrochemical derusting approach is not constrained by the shape of the objects. The rusty layer of iron rods and screws was electrochemically converted to iron by molten salt electrolysis. Thus, the high-temperature molten salt electrolysis may be an effective way to metalize iron rust and be used for repairing cultural relics and healing the rust layers on other metals.
  • 加载中
  •  

  • [1] Xiao-guang Liu,Qiu-shuo Mao,Yue Jiang,Yan Li,Jia-lin Sun, and Fei-xue Huang, Preparation of Al2O3–SiO2 composite aerogels and their Cu2+ absorption properties, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-020-2111-3
    [2] Long Meng, Zhan-cheng Guo, Jing-kui Qu, Tao Qi, Qiang Guo, Gui-hua Hou, Peng-yu Dong, and  Xin-guo Xi, Synthesis and characterization of Co3O4 prepared from atmospheric pressure acid leach liquors of nickel laterite ores, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1542-6
    [3] Rong-rong Wang, Jian-liang Zhang, Yi-ran Liu, An-yang Zheng, Zheng-jian Liu, Xing-le Liu, and  Zhan-guo Li, Thermal performance and reduction kinetic analysis of cold-bonded pellets with CO and H2 mixtures, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1623-6
    [4] Zhi-yu Chang, Ping Wang, Jian-liang Zhang, Ke-xin Jiao, Yue-qiang Zhang, and  Zheng-jian Liu, Effect of CO2 and H2O on gasification dissolution and deep reaction of coke, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-018-1694-4
    [5] Hui-ping Duan, Xiao Liu, Xian-zhe Ran, Jia Li, and  Dong Liu, Mechanical properties and microstructure of 3D-printed high Co-Ni secondary hardening steel fabricated by laser melting deposition, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1492-4
    [6] Yi-fan Zhang, Zhen Ji, Ke Chen, Cheng-chang Jia, Shan-wu Yang, and  Meng-ya Wang, Preparation and radar-absorbing properties of Al2O3/TiO2/Fe2O3/Yb2O3 composite powder, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1398-1
    [7] Kai-lin Cheng, Dao-bin Mu, Bo-rong Wu, Lei Wang, Ying Jiang, and  Rui Wang, Electrochemical performance of a nickel-rich LiNi0.6Co0.2Mn0.2O2 cathode material for lithium-ion batteries under different cut-off voltages, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1413-6
    [8] Xin Lu, Takahiro Miki, and  Tetsuya Nagasaka, Activity coefficients of NiO and CoO in CaO-Al2O3-SiO2 slag and their application to the recycling of Ni-Co-Fe-based end-of-life superalloys via remelting, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1375-8
    [9] Bing-wei Luo, Jie Zhou, Peng-peng Bai, Shu-qi Zheng, Teng An, and  Xiang-li Wen, Comparative study on the corrosion behavior of X52, 3Cr, and 13Cr steel in an O2-H2O-CO2 system:products, reaction kinetics, and pitting sensitivity, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1447-9
    [10] Jian-zheng Song, Zi-yang Zhao, Xin Zhao, Rui-dong Fu, and  Shu-min Han, Hydrogen storage properties of MgH2 co-catalyzed by LaH3 and NbH, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1509-z
    [11] Chun-fa Liao, Yun-fen Jiao, Xu Wang, Bo-qing Cai, Qiang-chao Sun, and  Hao Tang, Electrical conductivity optimization of the Na3AlF6-Al2O3-Sm2O3 molten salts system for Al-Sm intermediate binary alloy production, Int. J. Miner. Metall. Mater., https://doi.org/10.1007/s12613-017-1493-3
  • 加载中
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Share Article

Article Metrics

Article views(1444) PDF downloads(23) Cited by()

Proportional views

Electrochemical derusting in molten Na2CO3-K2CO3

  • Corresponding author:

    Hua-yi Yin    E-mail: yinhy@smm.neu.edu.cn

  • 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

Abstract: The formation of a rust layer on the surface of iron and steels accelerates their degradation and eventually causes the failure of materials. 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 lifespan of iron and steels. Herein, an electrochemical deoxidation approach is employed to repair the rust layer in molten Na2CO3-K2CO3. The rust consists of oxides which can be electrochemically reduced to metals/alloys, releasing oxide ions into the molten salt. The electrochemical method uses electrons to convert oxide to metal rather than remove the entire rust layer away. Due to the fluidity of the molten salt electrolyte, the electrochemical derusting approach is not constrained by the shape of the objects. The rusty layer of iron rods and screws was electrochemically converted to iron by molten salt electrolysis. Thus, the high-temperature molten salt electrolysis may be an effective way to metalize iron rust and be used for repairing cultural relics and healing the rust layers on other metals.

Catalog

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return