Micro structure and corrosion behavior of ALD AI2O3 film on AZ31 magnesium alloy with different surface roughness

作     者：Fumin Xu Lan Luo Lei Xiong Yong Liu Fumin Xu;Lan Luo;Lei Xiong;Yong Liu

作者机构：Key Laboratory of Lightweight and High Strength Structural Materials of Jiangxi ProvinceNanchang UniversityNanchang 330031China School of Materials Science and EngineeringNanchang UniversityNanchang 330001China 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2020年第8卷第2期

页      面：480-492页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：This work was supported by National Key Research and Development Program(Nos.2016YFB0701201,2016YFB0701203) National Natural Science Foundation of China(Nos.51671101) Domain Foundation of Equipment Advance Research of 13th Five-year Plan(No.61409220118) Natural Science Foundation of JiangXi Province(Nos.20171BCD40003) Key Research and Development Program of JiangXi Province(No GJJ150010) Nanchang University Graduate Innovation Special Fund(No.CX2018038) 

主　　题：Mg alloys Nano amorphous film Corrosion resistance Surface roughness Electrochemical measurement 

摘      要：There remains growing interest in magnesium(Mg)and its alloys,as they are the lightest structural metallic materials and potential metallic *** spite of the greatest historical Mg usage at present,the wider use of Mg alloys remains restricted by the poor corrosion resistance.A nano amorphous film,as the composition of Al2O3,had now been deposited on the AZ31 Mg alloy substrate by atomic layer deposition(ALD).Grazing incidence X-ray diffraction(GIXRD),X-ray reflectivity(XRR),X-ray photoelectron spectroscopy(XPS),atomic force microscope(AFM)and scanning electron microscopy(SEM)had been employed to identify the chemical compositions,microstructure and Al2O3/Mg interface of specimens *** corrosion behavior had been evaluated by neutral salt spray test and electrochemical *** results showed that nano amorphous film made a homogeneous cover on Mg *** film could improve the corrosion resistance of Mg alloy greatly,not only with a positive shift in Ecorr and a decrease in icorr,but also with a more uniform corroded ***,the roughness was found to be an important factor for corrosion resistant,in the way that rougher surface was corroded worse,and greater improvement would be in corrosion resistant after nano amorphous film deposition.