Microstructure and Properties of Micro-Arc Oxidization Coatings on Surface of High Purity Magnesium Prepared in Different Electrolyte Systems
摘 要
在硅酸盐、铝酸盐、硅酸盐与铝酸盐复合3种电解液体系中对纯镁表面进行微弧氧化处理,通过扫描电镜观察、能谱分析、X射线衍射分析和电化学测试等方法研究了微弧氧化膜的组织及性能。结果表明:硅酸盐体系中得到的微弧氧化膜最厚,其厚度为34.54 μm,组织相对致密均匀,主要由MgO和Mg2SiO4构成;复合体系中得到的微弧氧化膜的表面粗糙度最小,为0.19 μm,组织致密均匀,主要由MgO、Mg2SiO4和MgAl2O4构成;铝酸盐体系中得到的微弧氧化膜组织的致密性最差,主要由MgO和MgAl2O4构成;硅酸盐体系中得到的微弧氧化膜耐蚀性最好,其自腐蚀电流密度比基体的小一个数量级。
Abstract
The surface of pure magnesium was treated by micro-arc oxidation in three electrolyte systems of silicate system, aluminate system, silicate and aluminate composite system. The microstructure and properties of micro-arc oxidation coatings were studied by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and electrochemical testing. The results show that the micro-arc oxidation coating obtained in the silicate system had the thickest thickness of 34.54 μm, the structure was relatively dense and uniform, and the coating was mainly composed of MgO and Mg2SiO4. The micro-arc oxidation coating obtained in the composite electrolyte system was composed of MgO, Mg2SiO4 and MgAl2O4, and had the lowest surface roughness of 0.19 μm and a dense and uniform structure. The micro-arc oxidation coating obtained in the aluminate system was also composed of MgO and Mg2SiO4, and had the worst compactness in three electrolyte systems. The coating obtained in the silicate system had the best corrosion resistance, whose free corrosion current density was one order of magnitude less than that of magnesium substrate.
中图分类号 TG178 DOI 10.11973/fsyfh-201906001
所属栏目 试验研究
基金项目 山东理工大学博士科研启动经费资助项目(414014);山东省中青年科学家科研奖励基金项目(ZR2016EMB22);国家级大学生创新创业训练计划项目(201610433009)
收稿日期 2017/11/30
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联系人作者崔红卫(chw@sdut.edu.cn)
引用该论文: JIA Qiurong,CUI Hongwei,ZHANG Tiantian,CUI Xiaoli,PAN Yaokun,FENG Rui. Microstructure and Properties of Micro-Arc Oxidization Coatings on Surface of High Purity Magnesium Prepared in Different Electrolyte Systems[J]. Corrosion & Protection, 2019, 40(6): 391
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【3】陆正萍,王淑艳,夏永平,等. 电参数对AZ91D镁合金微弧氧化过程和膜层的影响. 腐蚀与防护,2012,33(5):385-389.
【4】朱利萍,鲁闯,王志锋,等. 石墨烯对镁合金微弧氧化层结构及性能的影响. 兵器材料科学与工程,2017,40(3):59-62.
【5】薛文斌,邓志威,张通和,等. 铸造镁合金微弧氧化机理. 稀有金属材料与工程,1999,28(6):353-356.
【6】LIN D J,HUNG F Y,LUI T S,et al. Heat treatment mechanism and biodegradable characteristics of ZAX1330 Mg alloy. Materials Science and Engineering:C,2015,51:300-308.
【7】WU S D,ZHANG H,DONG X D,et al. Physicochemical properties and in vitro cytocompatibility of modified titanium surfaces prepared via micro-arc oxidation with different calcium concentrations. Applied Surface Science,2015,329:347-355.
【8】BABAEI M,DEHGHANIAN C,VANAKI M. Effect of additive on electrochemical corrosion properties of plasma electrolytic oxidation coatings formed on CP Ti under different processing frequency. Applied Surface Science,2015,357:712-720.
【9】刘江. 纯镁超声微弧氧化-多种复合处理生物涂层的研究. 佳木斯:佳木斯大学,2014.
【10】李慕勤,刘江,蔡丁森,等. 纯镁超声微弧氧化-HF-Na2SiO3复合处理对生物涂层的影响. 中国表面工程,2014,27(3):50-56.
【11】赵立臣,崔春翔,刘双进,等. 纯镁微弧氧化陶瓷层的耐蚀性和Ca-P沉积. 功能材料,2014,45(15):15017-15022.
【12】YU H J,DONG Q,DOU J H,et al. Structure and in vitro bioactivity of ceramic coatings on magnesium alloys by microarc oxidation. Applied Surface Science,2016,388:114-119.
【13】LU Y J,WAN P,TAN L L,et al. Preliminary study on a bioactive Sr containing Ca-P coating on pure magnesium by a two-step procedure. Surface and Coatings Technology,2014,252:79-86.
【14】刘继光,孙玉龙,李慕勤,等. 纯镁微弧氧化-HF-硅溶胶复合处理涂层细胞相容性研究. 口腔医学研究,2015,31(5):429-432,436.
【15】曾云,高欢,张玉林,等. 纯镁微弧氧化陶瓷层的耐蚀性能. 材料热处理学报,2016,37(S1):125-129.
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【17】BARATI DARBAND G,ALIOFKHAZRAEI M,HAMGHALAM P,et al. Plasma electrolytic oxidation of magnesium and its alloys:mechanism,properties and applications. Journal of Magnesium and Alloys,2017,5(1):74-132.
【18】赵玉厚,张敏,王萍. 电解液对镁合金微弧氧化层耐蚀性的影响. 西安工业大学学报,2012,32(2):131-135.
【19】王萍,李建平,杨忠. 硅酸盐体系中Mg-Gd-Y系镁合金微弧氧化配方优化. 西安工业大学学报,2009,29(6):552-555.
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