Effect of liquid crystal polymer micro-bump structure prepared by mesh method on the frictional corrosion performance of micro-arc oxide coated pure aluminum disks

• Published in: Surface & coatings technology 2022-09, Vol.446, p.128748, Article 128748
• Main Authors: Chai, Guiquan, Lu, Hailin, Xue, Bowen, Jia, Endong, Yang, Huiyun, Wang, Changkai
• Format: Article
• Language: English
• Subjects: Aluminum disk; Composite coating; Corrosion; Frictional corrosion; Liquid crystal polymer (LCP); Micro-arc oxidation
• ISSN: 0257-8972; 1879-3347
• DOI: 10.1016/j.surfcoat.2022.128748

In this study, micro-arc oxidation (MAO) technology was used to coat the surface of pure aluminum disks. Then the liquid crystal polymer (LCP) was used in the mesh method to form a micro-bump structure on the MAO coating. Compared with a single MAO coating, the micro-bump composite coating has a low coefficient of friction, high corrosion resistance, and excellent resistance to frictional corrosion. The microstructure and composition of both coatings were characterized by metallurgical microscopy, SEM, EDS, XRD, and XPS. And the protection mechanism, as well as the physical model of the LCP micro-bump coating, are presented and discussed. In summary, the preparation of micro-bump structures on MAO surfaces using the mesh method provides a feasible improvement idea for the shortcomings of MAO technology. •Micro-bump surface structure prepared by mesh separation method.•The LCP micro-bump structure reduces the wear volume of the friction counterpart.•The composite coating is wear and corrosion resistant.