电压对纯镁微弧氧化膜层电化学腐蚀行为的影响

兰州理工大学学报 ›› 2020, Vol. 46 ›› Issue (3): 1-6.

• 材料科学与工程 • 下一篇

电压对纯镁微弧氧化膜层电化学腐蚀行为的影响

马颖, 张青菊, 安凌云, 王兴平, 孙乐, 王晟

兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050

收稿日期:2019-03-22 出版日期:2020-06-28 发布日期:2020-08-19
作者简介:马颖(1966-),女,青海西宁人,教授,博导.
基金资助:
甘肃省创新研究群体计划项目(1111RJDA011)

Effects of voltage on electrochemical corrosion behavior of micro-arc oxidation coatings

MA Ying, ZHANG Qing-ju, AN Ling-yun, WANG Xing-ping, SUN Le, WANG Sheng

State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2019-03-22 Online:2020-06-28 Published:2020-08-19

摘要/Abstract

摘要： 采用循环伏安(CV)、动电位极化(Tafel)和电化学阻抗谱(EIS)技术、结合纯镁微弧氧化膜微观形貌,研究电压对膜层电化学腐蚀行为的影响.结果表明:电压对膜层耐蚀性影响显著,随着电压升高,膜层耐蚀性增强,这是因为较厚的膜层厚度为抵御腐蚀介质的侵蚀提供了良好的物理屏障.在整个腐蚀试验过程中,高电压下制备的膜层经历三个阶段:腐蚀介质逐渐渗入膜层,腐蚀介质渗透膜层到达膜基面侵蚀基体,腐蚀产物填充微孔和微裂纹等缺陷.相比而言,低电压下制备的膜层随着浸泡时间的延长,膜层外部疏松层和内部致密层的电阻均逐渐减小,致使耐蚀性降低,最终膜层完全失效.

关键词: 纯镁, 微弧氧化, 电压, 腐蚀行为

Abstract: The effects of voltage on the electrochemical corrosion behavior of micro-arc oxidation (MAO) coatings formed on pure magnesium were studied by using cyclic voltammetry (CV), potentiodynamic polarization (Tafel) and electrochemical impedance spectroscopy (EIS). SEM was adopted to characterize microstructure of the coatings. The results show that the voltage has significant effects on corrosion resistance of the coatings. With increase of voltage, the corrosion resistance of the coatings gets improved. This may be attributed to the coating's thicker thickness which may provide a good physical barrier against the erosion of the corrosion medium. During the whole corrosion process, the coating prepared in the high voltage experiences three stages: the corrosion medium gradually infiltrates into the coating, then corrosion medium penetrates the coating to the interface between the coating and the substrate, and eventually corrosion products fill into defects such as micropores and microcracks. In contrast, for coatings prepared under low voltage, the electric resistance of both loose layer out of the coating and dense part in the core of the coating decreases gradually with the immersion time prolonging. This results in the corrosion resistance of the coating decreasing, and finally the coating fails completely as a result.

Key words: pure magnesium, micro-arc oxidation, voltage, corrosion behavior

中图分类号:

TG174

马颖, 张青菊, 安凌云, 王兴平, 孙乐, 王晟. 电压对纯镁微弧氧化膜层电化学腐蚀行为的影响[J]. 兰州理工大学学报, 2020, 46(3): 1-6.

MA Ying, ZHANG Qing-ju, AN Ling-yun, WANG Xing-ping, SUN Le, WANG Sheng. Effects of voltage on electrochemical corrosion behavior of micro-arc oxidation coatings[J]. Journal of Lanzhou University of Technology, 2020, 46(3): 1-6.

参考文献

[1] FARHADI S S,ALIOFKHAZRAEI M,BARATI DARBAND G,et al. Corrosion and wettability of PEO coatings on magnesium by addition of potassium stearate [J].Journal of Magnesium and Alloys,2017,5(2):210-216.
[2] XIE H J,CHENG Y L,LI S X,et al.Wear and corrosion resistant coatings on surface of cast A356 aluminum alloy by plasma electrolytic oxidation in moderately concentrated aluminate electrolytes [J].Transactions of Nonferrous Metals Society of China,2017,27(2):336-351.
[3] WHEELER J M,COLLIER C A,PAILLARD J M,et al.Evaluation of micromechanical behaviour of plasma electrolytic oxidation (PEO) coatings on Ti-6Al-4V [J].Surface & Coatings Technology,2010,204(21/22):3399-3409.
[4] MONTAZREI M,DEHGHANIAN C,SHOKOUHFAR M,et al.Investigation of the voltage and time effects on the formation of hydroxyapatite-containing titania prepared by plasma electrolytic oxidation on Ti-6Al-4V alloy and its corrosion behavior [J].Applied Surface Science,2011,257(16):7268-7275.
[5] LI Z,YUAN Y,JING X.Effect of current density on the structure,composition and corrosion resistance of plasma electrolytic oxidation coatings on Mg-Li alloy [J].Journal of Alloys & Compounds,2012,541(22):380-391.
[6] HWANG I J,HWANGH D Y,KO Y G,et al.Correlation between current frequency and electrochemical properties of Mg alloy coated by micro arc oxidation [J].Surface & Coatings Technology,2012,206(15):3360-3365.
[7] LU Shaofu,LOU Bihshow,YANG Yungchin,et al.Effects of duty cycle and electrolyte concentration on the microstructure and biocompatibility of plasma electrolytic oxidation treatment on zirconium metal [J].Thin Solid Films,2015,596:87-93.
[8] 马颖,刘云坡,安凌云,等.三氧化钼和钼酸钠对镁合金微弧氧化膜的影响 [J].兰州理工大学学报,2018,44(3):6-11.
[9] 赵晴,胡勇,杜楠.氧化时间对MB8镁合金微弧氧化膜的影响 [J].航空材料学报,2007,27(6):55-58.
[10] TRAN Q P,KUO Y C,SUN J K,et al.High quality oxide-layers on Al-alloy by micro-arc oxidation using hybrid voltages [J].Surface and Coatings Technology,2016,303(Part A):61-67.
[11] 马颖,王宇顺,王劲松,等.不同电压下CrO3对镁合金微弧氧化膜的影响 [J].兰州理工大学学报,2011,37(4):1-5.
[12] XU J,LIU F,LUO J,et al.Effects of anodic voltages on microstructure and properties of plasma electrolytic oxidation coatings on biomedical NiTi alloy [J].Journal of Materials Science & Technology,2013,29(1):22-28.
[13] KASEEM M,KAMIL M P,KO Y G.Electrochemical response of MoO₂-Al₂O₃ oxide films via plasma electrolytic oxidation [J].Surface and Coatings Technology,2017,322:163-173.
[14] YEROKHIN A L,NIE X,LEYLANG A,et al.Characterisation of oxide films produced by plasma electrolytic oxidation of a Ti-6Al-4V alloy [J].Surface and Coatings Technology,2000,130(2/3):195-206.
[15] 王丽,陈砺,王红林,等.等离子体电解氧化膜的工艺优化及耐腐蚀性能评价 [J].腐蚀与防护,2009,30(6):388-391.
[16] 杨培霞,郭洪飞,安茂忠,等.镁合金表面微弧氧化陶瓷膜耐蚀性能评价 [J].航空材料学报,2007,27(3):33-37.
[17] LIANG J,SRINIVASAN P B,BLAWERT C,et al.Comparison of electrochemical corrosion behaviour of MgO and ZrO₂ coatings on AM50 magnesium alloy formed by plasma electrolytic oxidation [J].Corrosion Science,2009,51(10):2483-2492.
[18] LIU F,SHAN D,SONG Y,et al.Corrosion behavior of the composite ceramic coating containing zirconium oxides on AM30 magnesium alloy by plasma electrolytic oxidation [J].Corrosion Science,2011,53(11):3845-3852.

电压对纯镁微弧氧化膜层电化学腐蚀行为的影响

Effects of voltage on electrochemical corrosion behavior of micro-arc oxidation coatings

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 12

编辑推荐

Metrics

本文评价

[1]	王占营, 马颖, 安守静, 王晟. 纯镁及AZ91D镁合金微弧氧化膜层耐蚀性的对比[J]. 兰州理工大学学报, 2023, 49(3): 1-8.
[2]	贾金凤, 王江, 陈大林, 刘俊钊, 王振铭. Inconel 625合金在富氧高温熔渣中的腐蚀行为[J]. 兰州理工大学学报, 2023, 49(3): 9-14.
[3]	汪浩, 马颖, 王占营, 安凌云, 刘云坡. 添加剂K₂ZrF₆和EDTA-Na与电压及其交互作用对镁合金微弧氧化膜耐蚀性的影响[J]. 兰州理工大学学报, 2023, 49(2): 1-8.
[4]	孙永江, 张金玲, 翟海民, 王海鹏, 李文生. Zn-Al冷喷涂复合涂层耐3.5 wt.%NaCl溶液腐蚀行为[J]. 兰州理工大学学报, 2023, 49(2): 17-23.
[5]	陈伟, 倪源宏, 纪青春, 王忠飞, 何峰. 光伏发电系统对配电网三相电压不平衡度影响的计算方法[J]. 兰州理工大学学报, 2023, 49(2): 76-82.
[6]	唐梦兰, 王军, 刘天增, 李俊琛, 冯力. 热处理对硝酸熔盐中347H不锈钢腐蚀行为的影响[J]. 兰州理工大学学报, 2021, 47(5): 1-9.
[7]	毕广利, 陈思琦, 姜静, 李元东, 张于胜, 蒋春宏. 滑动摩擦加工挤压Mg-Dy-Ni合金的显微组织、力学及腐蚀性能[J]. 兰州理工大学学报, 2021, 47(4): 13-21.
[8]	吴丽珍, 安利锋, 陈伟, 郝晓弘. 考虑电网阻抗变化的LLCL并网逆变器谐振抑制策略[J]. 兰州理工大学学报, 2021, 47(4): 76-82.
[9]	王晟, 黄志杰, 兰晔峰, 刘康康, 王小龙, 马颖. 处理面积对AZ31B镁合金微弧氧化负载特性的影响[J]. 兰州理工大学学报, 2020, 46(5): 7-12.
[10]	马颖, 梁志龙, 安凌云, 孙乐, 王晟, 王占营. 不同电压下制备等厚微弧氧化膜层的能耗及膜层的耐蚀性[J]. 兰州理工大学学报, 2020, 46(4): 6-9.
[11]	马颖, 刘金忠, 安凌云, 王兴平, 孙乐, 王晟. AM60B镁合金微弧氧化膜的电化学腐蚀行为[J]. 兰州理工大学学报, 2020, 46(2): 13-18.
[12]	吴丽珍, 王晓婷, 郝晓弘. 多母线微电网电压不平衡分层分区优化控制[J]. 兰州理工大学学报, 2020, 46(1): 111-117.