Microstructure and Property of Composite Coatings on AZ91 Mg-alloy Prepared by Micro-arc Oxidation and Electroless Cu-layer

doi:10.11902/1005.4537.2017.061

Journal of Chinese Society for Corrosion and protection

2018, Vol. 38

Issue (4): 391-396 DOI: 10.11902/1005.4537.2017.061

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Microstructure and Property of Composite Coatings on AZ91 Mg-alloy Prepared by Micro-arc Oxidation and Electroless Cu-layer

Zhihu WANG¹, Jumei ZHANG², Lijing BAI¹, Guojun ZHANG¹(

)

1 School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China
2 School of Materials Science and Engineering, Xi'an University of Science &Technology, Xi'an 710054, China;

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Abstract

MgO ceramic coating was prepared firstly on AZ91 Mg-alloy by micro-arc oxidation (MAO),and on which then a Cu-layer was deposited by electroless copper plating. The microstructure, composition, corrosion resistance and electrical conductivity of the composite coating were characterized by means of SEM, XRD, EDS, electrochemical techniques and four-point probe test. The results indicate that the corrosion resistance of Mg-alloy can be effectively improved due to the existence of the ceramic MAO coating, and the 2.5 μm-thick Cu-layer is evenly covered on the surface of MAO coating, while the deposited Cu penetrates and fills the reticular-like pores on the MAO coating and thus to realize a mechanical interlock between the Cu-layer and the MAO coating. The composite coating exhibits well electrical conductivity. Meanwhile, the free corrosion potential of the composite coating increases by 0.2 V, and the corrosion current density is one order of magnitude lower in comparison with the bare Mg-alloy. However, the corrosion resistance of the composite coating is inferior to that of the MAO coating because of the galvanic corrosion between the Cu-layer and the matrix Mg-alloy.

Key words: Mg-alloy micro-arc oxidation electroless copper plating corrosion resistance electrical conductivity

Received: 25 April 2017

ZTFLH:	TG174.44
	TG179

Fund: Supported by National Natural Science Foundation of China (51674196, 51601144 and 51701162)

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Cite this article:

Zhihu WANG, Jumei ZHANG, Lijing BAI, Guojun ZHANG. Microstructure and Property of Composite Coatings on AZ91 Mg-alloy Prepared by Micro-arc Oxidation and Electroless Cu-layer. Journal of Chinese Society for Corrosion and protection, 2018, 38(4): 391-396.

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https://www.jcscp.org/EN/10.11902/1005.4537.2017.061 OR https://www.jcscp.org/EN/Y2018/V38/I4/391

Fig.1 XRD patterns of MAO coating (a) and electroless copper plating coating (b)

Fig.2 SEM images of the surfaces of MAO coating (a, b) and electroless copper plating coating (c, d)

Fig.3 Cross-section morophology of the composite coating

Fig.4 EDS results of the points A (a) and B (b) in Fig.3

Fig.5 Polarization curves of bare Mg alloy, MAO coating and composite coating

Table 1 Polarization parameters of bare Mg alloy, MAO coating and composite coating

[1]	Easton M, Beer A, Barnett M, et al.Magnesium alloy applications in automotive structures[J]. JOM, 2008, 60: 57
[2]	Xiao B, Kang F, Hu C K, et al.Application of the light structure material in the defense industry abroad[J]. Ordnance Mater. Sci. Eng., 2011, 34(1): 94(肖冰, 康凤, 胡传凯等. 国外轻质结构材料在国防工业中的应用[J]. 兵器材料科学与工程, 2011, 34(1): 94)
[3]	Li Z J, Gu X A, Lou S Q, et al.The development of binary Mg-Ca alloys for use as biodegradable materials within bone[J]. Biomaterials, 2008, 29: 1329
[4]	Liu Y, Liu S M, Yu L P, et al.Summary on corrosion behavior and micro-arc oxidation for magnesium alloys[J]. J. Chin. Soc. Corros. Prot., 2015, 35: 99(刘胤, 刘时美, 于鲁萍等. 镁合金的腐蚀与微弧氧化膜层研究[J]. 中国腐蚀与防护学报, 2015, 35: 99)
[5]	Yu G, Liu Y L, Li Y, et al.Corrosion and protection of magnesium alloys[J]. Chin. J. Nonferrous Met., 2002, 12: 1087(余刚, 刘跃龙, 李瑛等. Mg合金的腐蚀与防护[J]. 中国有色金属学报, 2002, 12: 1087)
[6]	Song Y L, Liu Y H, Zhu X Y, et al.Advance in studies on corrosion behavior of die-casting magnesium alloys[J]. Foundry, 2007, 56: 36(宋雨来, 刘耀辉, 朱先勇等. 压铸镁合金腐蚀行为研究进展[J]. 铸造, 2007, 56: 36)
[7]	Durdu S, Aytaç A, Usta M.Characterization and corrosion behavior of ceramic coating on magnesium by micro-arc oxidation[J]. J. Alloy. Compd., 2011, 509: 8601
[8]	Jiang B L, Zhang S F, Wu G J.The study of the corrosion resistance of the ceramic coatings formed by micro-arcoxidation on the mg-base alloy[J]. J. Chin. Soc. Corros. Prot., 2002, 22: 300(蒋百灵, 张淑芬, 吴国建. 镁合金微弧氧化陶瓷层耐蚀性的研究[J]. 中国腐蚀与防护学报, 2002, 22: 300)
[9]	Peng J H, Huang F L, Liu G, et al.Dry sliding wear behavior of AZ91D Mg alloy with micro-arc-oxidation coating[J]. Chin. J. Nonferrous Met., 2009, 19: 981(彭继华, 黄芳亮, 刘刚等. AZ91D镁合金微弧氧化涂层的干摩擦磨损行为[J]. 中国有色金属学报, 2009, 19: 981)
[10]	Dong H R, Ma Y, Guo H X, et al.Compactness of micro-arc oxidation coatings on AZ91D magnesium alloys and its effect on coating corrosion resistance[J]. Chin. J. Nonferrous Met., 2015, 25: 844(董海荣, 马颖, 郭惠霞等. AZ91D镁合金微弧氧化膜的致密性及其对耐蚀性的影响[J]. 中国有色金属学报, 2015, 25: 844)
[11]	Shi H Y, Dong L F, Jiang B L, et al.Microstructure and corrosion properties of micro-arc oxidation composite electrophoretic coating on AZ31B magnesium alloy[J]. Rare Met. Mater. Eng., 2015, 44: 1679(时惠英, 董利芳, 蒋百灵等. AZ31B镁合金表面微弧电泳复合膜层微观结构及耐蚀性表征[J]. 稀有金属材料与工程, 2015, 44: 1679)
[12]	Laleh M, Kargar F, Rouhaghdam A S.Improvement in corrosion resistance of micro arc oxidation coating formed on AZ91D magnesium alloy via applying a nano-crystalline sol-gel layer[J]. J. Sol-Gel Sci. Technol., 2011, 59: 297
[13]	Li J M, Xue X N, Wang A J, et al.Electroless nickel plating of magnesium alloy with microarc oxidation pretreatment[J]. J. Chin.Soc. Corros. Prot., 2012, 32: 23(李均明, 薛晓楠, 王爱娟等. 镁合金微弧氧化预处理化学镀镍研究[J]. 中国腐蚀与防护学报, 2012, 32: 23)
[14]	Lai X M, Kang Z X, Li Y Y.Duplex surface modification combined with micro-arc oxidation and polymer plating on AZ31 magnesium alloy and their functional properties[J]. Chin. J. Nonferrous Met., 2011, 21: 1299(赖晓明, 康志新, 李元元. AZ31镁合金微弧氧化与有机镀膜的复合表面改性及功能特性[J]. 中国有色金属学报, 2011, 21: 1299)
[15]	Kang Z X, Lai X M, Wang F, et al.Preparation of super-hydrophobic duplex-treated film on surface of Mg-Mn-Ce magnesium alloy and its corrosion resistance[J]. Chin. J. Nonferrous Met., 2011, 21:283(康志新, 赖晓明, 王芬等. Mg-Mn-Ce镁合金表面超疏水复合膜层的制备及耐腐蚀性能[J]. 中国有色金属学报, 2011, 21: 283)
[16]	Lv M, Liu J G, Zeng X Y, et al.High-adhesion Cu patterns fabricated by nanosecond laser modification and electroless copper plating[J]. Appl. Surf. Sci., 2015, 353: 1150
[17]	Jiang B L, Zhang X F.Growth process and corrosion resistance of ceramic coatings formed by micro-arc oxidation on magnesium alloy[J]. J. Chin. Soc. Corros. Prot., 2005, 25: 97(蒋百灵, 张先锋. 镁合金微弧氧化陶瓷层的生长过程及其耐蚀性[J]. 中国腐蚀与防护学报, 2005, 25: 97)
[18]	Chen D C, Li W F, Jie J, et al.Micro-structure and composition of ceramic coating on AZ91D magnesium alloy prepared by micro-arc oxidation[J]. Rare Met. Mater. Eng., 2009, 38(Suppl.2): 731(陈东初, 李文芳, 揭军等. AZ91D镁合金表面微弧氧化陶瓷膜微观结构与组成的研究[J]. 稀有金属材料与工程, 2009, 38(增刊2): 731)
[19]	Shang W, Chen B Z, Shi X C, et al.Electrochemical corrosion behavior of composite MAO/sol-gel coatings on magnesium alloy AZ91D using combined micro-arc oxidation and sol-gel technique[J]. J. Alloy. Compd., 2009, 474: 541
[20]	Duan H P, Du K Q, Yan C W, et al.Electrochemical corrosion behavior of composite coatings of sealed MAO film on magnesium alloy AZ91D[J]. Electrochim. Acta, 2006, 51: 2898
[21]	Zhao M Q, Lei A L.The Corrosion and Protection of Metals [M]. Beijing: National Defense Industry Press, 2002(赵麦群, 雷阿利. 金属的腐蚀与防护 [M]. 北京: 国防工业出版社, 2002)
[22]	Ma R Z, Jiang M H, Xu Z X.Introduction to Functional Materials Science [M]. Beijing: Metallurgical Industry Press, 2006(马如璋, 蒋民华, 徐祖雄. 功能材料学概论 [M]. 北京: 冶金工业出版社, 2006)

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