Influence of DC Current on Corrosion Behaviour of Copper-Aluminium Composite Plates

• 作者: Yu-Lin Cheng Xiao-Jiao Zuo Xiao-Guang Yuan Hong-Jun Huang Yi-Fan Zhang
• 来源期刊: 金属学报（英文版）
• 年，卷（期）: 2021,（8）
• 页码范围: 1142-1152
• 页数: 11页
• 语种: 英文

摘要

In this study,neutral salt spray accelerated corrosion test of copper-aluminium composite under 0-125A DC current was carried out under 5％ concentration.The effect of corrosion behaviour on copper-aluminium composite by DC current was carried out by a scanning electron microscope (SEM) with energy-dispersive spectroscopy (EDS),X-ray diffraction (XRD)patterns,X-ray photoelectron spectroscopy (XPS),weight-loss method and electrochemical analysis.The results show that the current can accelerate the corrosion rate.Meanwhile,the current temperature effect can reduce the corrosion rate.The current caused directional migration of ions resulting in different corrosion products on positive and negative poles of specimen,and the corrosion degree on the positive pole was more serious.The galvanic corrosion mechanism at the cop-per-aluminium interface is different from the pitting corrosion mechanism far away from the interface,and the latter is more affected by DC current.