The influence of pH and metallographic structure on the corrosion behavior of copper–drawn steel is studied with the simulated system. The effect of pH on the corrosion behavior of copper–drawn steel has been investigated using open-circuit potential, potentiodynamic polarization, galvanic current measurement, scanning electron microscopy and scanning vibrating electrode technique techniques. The steel is corroded as anode, while the corrosion of copper plate is protected as cathode. All the results revealed that pH and metallographic structure had a significant influence on the corrosion behavior of copper–drawn steel. With the decrease in pH value from 6 to 2.4, the corrosion rate of copper–drawn steel galvanic couple (Cu–Fe GC) obviously increased in the simulated solution of acidic red soil. The electric field formed by the Cu–Fe GC changes the direction of ion migration between the copper and drawn steel electrodes, which impacts the composition and microstructure of corrosion products formed on the electrode surface.

用模拟系统研究了pH值和金相组织对拉拔铜的腐蚀行为的影响。已使用开路电势，电势极化，电电流测量，扫描电子显微镜和扫描振动电极技术研究了pH对铜拉丝钢腐蚀行为的影响。钢被腐蚀为阳极，而铜板的腐蚀被保护为阴极。所有结果表明，pH和金相组织对拉拔铜的腐蚀行为有重要影响。随着pH值从6降低到2.4，在酸性红壤模拟溶液中，铜拉丝钢电偶（Cu-Fe GC）的腐蚀速率明显增加。