Corrosion resistance and mechanism of (100), (110) and (111) preferred orientation of single crystal copper in NaCl solution
Jian Shang, Song Sun, Simeng Liu
Abstract
In present work, the immersion and electrochemical corrosion resistance of single-crystal copper with (100), (110), (111) preferred orientation were studied in 3.5 wt% NaCl solution. The scanning electron microscopy and X-ray photoelectron spectroscopy, Laser Raman spectroscopy were used to observe corroded surface morphology and analyze the corroded products. The experimental results show that preferential orientation has a significant effect on the corrosion resistance of single crystal copper. The self-corrosion current densities of (100), (110), and (111) oriented single-crystal copper were 1.1455 μA/cm2,0.7312 μA/cm2 and 1.4117 μA/cm2 respectively. The corrosion resistance was in the order of (110) > (100) > (111). Optimally oriented surface can effectively improve the corrosion resistance of copper.