Effect of carbonate additive on the microstructure and corrosion resistance of plasma electrolytic oxidation coating on Mg-9Li-3Al alloy

作     者：Siyuan Jin Xiaochun Ma Ruizhi Wu Tingqu Li Jiaxiu Wang Boris L Krit Legan Hou Jinghuai Zhang Guixiang Wang Siyuan Jin;Xiaochun Ma;Ruizhi Wu;Tingqu Li;Jiaxiu Wang;Boris L Krit;Legan Hou;Jinghuai Zhang;Guixiang Wang

作者机构：Key Laboratory of Superlight Materials&Surface TechnologyMinistry of EducationHarbin Engineering UniversityHarbin 150001China College of Materials Science and EngineeringJilin Institute of Chemical TechnologyJilin 132022China College of ScienceHeihe UniversityHeihe 164300China Moscow Aviation InstituteNational Research UniversityMoscow 125993Russia 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2022年第29卷第7期

页      面：1453-1463页

核心收录：

学科分类：080503[工学-材料加工工程] 0819[工学-矿业工程] 08[工学] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the Natural Science Foundation of China (Nos.51771060,51871068,51971071,and 52011530025) the Domain Foundation of Equipment Advance Research of 13th Five-year Plan,China(No.61409220118) the Zhejiang Province Key Research and Development Program,China (No.2021C01086) the Open Foundation of Key Laboratory of Superlight Materials&Surface Technology of Ministry of Education,China (No.HEU10202104) 

主　　题：Mg-Li alloy plasma electrolytic oxidation corrosion resistance carbonate 

摘      要：Carbonate was added to the silicate system electrolyte to improve the corrosion resistance of the plasma electrolytic oxidation coating on Mg-9Li-3Al(wt%,LA93)alloy.The influences of carbonate on the morphology,structure,and phase composition of the coating were investigated by scanning electron microscopy,energy dispersive spectrometry,X-ray diffraction,and X-ray photoelectron spectroscopy.The corrosion resistance of the coating was evaluated by electrochemical experiment,hydrogen evolution,and immersion test.The results showed that the addition of carbonate resulted in a denser coating with increased hardness,and the corrosion-resistant Li_(2)CO_(3) phase was formed.Electrochemical experiments showed that compared with the coating without carbonate,the corrosion potential of the carbonate coating positively shifted(24 mV),and the corrosion current density was reduced by approximately an order of magnitude.The coating with carbonate addition possessed a high corrosion resistance and long-term protection capability.