J. Mater. Sci. Technol. ›› 2025, Vol. 222: 273-289.DOI: 10.1016/j.jmst.2024.09.047

• Research Article • Previous Articles     Next Articles

Insight into the acceleration effect of current-carrying condition on copper conductor atmospheric corrosion

Qiubo Lia, Wei Wua,*, Yizhe Sua, Xiaojian Xiab, Junxi Zhanga,*   

  1. aShanghai Key Laboratory of Material Protection and Advanced Material in Electric Power, Shanghai University of Electric Power, Shanghai 200090, China;
    bElectric Power Research Institute of State Grid Fujian Electric Power Company Limited, Fuzhou 350007, China
  • Received:2024-09-26 Accepted:2024-09-26 Published:2025-07-01 Online:2024-11-13
  • Contact: * E-mail addresses: wuweicorr@shiep.edu.cn (W. Wu), zhangjunxi@shiep.edu.cn (J. Zhang).

Abstract: Copper is widely used as conductive components in transmission lines, facing severe corrosion risks. The current passing through copper conductors will significantly affect its corrosion process, yet there is a lack of detailed study on the corrosion mechanism under this specific condition. Thus, this study investigated the effect of direct current current-carrying (DC C-C) conditions on the atmospheric corrosion behavior of copper conductors under thin electrolyte layer (TEL) through electrochemical measurements and corrosion exposure experiments. Results revealed that the presence of DC C-C significantly hastened the corrosion process of copper conductors in the TEL, leading to distinct corrosion patterns at the input and output ends. Furthermore, both the extent of corrosion acceleration and the unevenness of corrosion were positively correlation with the DC C-C level. The above phenomenon was attributed to the special motion of charged particles and paramagnetic substances in TEL under the self-generated magnetic field.

Key words: Copper conductor, Atmospheric corrosion, Current-carrying condition, Self-generated magnetic field, Electrochemistry, Thin electrolyte layer