Anticorrosion performance of LDH coating prepared by CO2pressurization method????(Open Access)

作者：Zhang, Xiaochen; Jiang, Peng; Zhang, Chunyan; Buhe, Bateer; Liu, Bin; Zhao, Yang; Zhang, Tao^*; Meng, Guozhe; Wang, Fuhui

来源：International Journal of Corrosion, 2018, 2018: 9696549.

DOI：10.1155/2018/9696549

• Anticorrosion performance
• Conversion coatings
• Cross-sectional morphology
• Hydrogen evolution
• Immersion tests
• Layered double hydroxides
• Polarization curves
• Pressurization methods

Many surface treatment methods are used to improve the corrosion resistance of magnesium alloys. LDH (layered double hydroxides) conversion coatings are currently found in the most environmentally friendly and pollution-free coatings of magnesium alloy. In this study, the CO2pressurization method was applied to the preparation of LDH coating on magnesium alloy for the first time. The effect of CO2pressurization on the formation and corrosion resistance of LDH coating on AZ91D alloy was investigated. The hardness and adhesion were significantly higher on LDH coating in the case of CO2pressurization than it is in atmospheric pressure. The surface and cross-sectional morphologies show that LDH coating is more compact in the case of CO2pressurization than with atmospheric pressure. The results of the polarization curve, hydrogen evolution, and immersion tests indicate that the corrosion resistance of the LDH coating prepared by the CO2pressurization method was significantly improved.

• 出版日期2018
• 单位Northeastern university; 哈尔滨工程大学; 东北大学