Study on properties of MAO/PCL composite coating on ZK60 magnesium alloy

作     者：Yang, Junwei Chen, Xiaowen Luo, Bin Tang, Song Xie, Wanlin Zhang, Defen 

作者机构：Southwest Petr Univ State Key Lab Oil Gas Reservoir Geol & Exploitat Chengdu Sichuan Peoples R China Southwest Petr Univ Sch New Energy & Mat Chengdu 610500 Sichuan Peoples R China 

出 版 物：《INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY》 (Int. J. Appl. Ceram. Technol.)

年 卷 期：2025年第22卷第3期

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：National Natural Science Foundation of China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University) [PLN2021-22] Sichuan Provincial Engineering Research Center for Advanced Materials Preparation Technology for Shale Gas Efficient Exploitation Fund [2022SCYYQKCCL012] 51774249 

主　　题：corrosion degradation microarc oxidation polycarbonate ZK60 magnesium alloy 

摘      要：Microarc oxidation technology enhances magnesium alloy surfaces but faces cracks and micropores. Adding C6H10CaO6 and Ca(OH)2 only partially solves this. This study used immersion pulling to create a microarc oxidation/polycaprolactone composite film, examining its properties and degradation. The film transitioned from smooth to porous with calcium and phosphorus deposits. After 56 days, the Ca/P ratio approached the ideal 1.67, matching the biological environment. The polycaprolactone layer thinned in corrosive media, with hydrogen bubbles and film detachment. Surface sediments included Ca2P2O7 and hydroxyapatite (HA), important for biocompatibility. Cell experiments showed superior adhesion and proliferation on the composite film compared to controls. A degradation model revealed the film s protective role during three stages. In summary, the composite film exhibits excellent surface morphology and composition, promotes cell growth, and protects the magnesium alloy substrate during degradation.