Corrosion resistance of cerium-doped zinc calcium phosphate chemical conversion coatings on AZ31 magnesium alloy

IMR OpenIR

	Corrosion resistance of cerium-doped zinc calcium phosphate chemical conversion coatings on AZ31 magnesium alloy
	Zeng, Rong-chang; Hu, Yan; Zhang, Fen; Huang, Yuan-ding; Wang, Zhen-lin; Li, Shuo-qi; Han, En-hou; rczeng@foxmail.com
	2016
发表期刊	TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN	1003-6326
卷号	26 期号:2 页码:472-483
摘要	Zinc calcium phosphate (Zn-Ca-P) coating and cerium-doped zinc calcium phosphate (Zn-Ca-Ce-P) coating were prepared on AZ31 magnesium alloy. The chemical compositions, morphologies and corrosion resistance of coatings were investigated through energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), electron probe micro-analysis (EPMA) and scanning electron microscopy (SEM) together with hydrogen volumetric and electrochemical tests. The results indicate that both coatings predominately contain crystalline hopeite (Zn-3(PO4)(2)center dot 4H(2)O), Mg-3(PO4)(2) and Ca-3(PO4)(2), and traces of non-crystalline MgF2 and CaF2. The Zn-Ca-Ce-P coating is more compact than the Zn-Ca-P coating due to the formation of CePO4, and displays better corrosion resistance than the Zn-Ca-P coating. Both coatings protect the AZ31 Mg substrate only during an initial immersion period. The micro-galvanic corrosion between the coatings and their substrates leads to an increase of hydrogen evolution rate (HER) with extending the immersion time. The addition of Ce promotes the homogenous distribution of Ca and formation of hopeite. The Zn-Ca-Ce-P coating has the potential for the primer coating on magnesium alloys.
部门归属	[zeng, rong-chang ; hu, yan ; zhang, fen ; li, shuo-qi] shandong univ sci & technol, coll mat sci & engn, qingdao 266590, peoples r china ; [zeng, rong-chang ; hu, yan ; zhang, fen ; li, shuo-qi] shandong univ sci & technol, state key lab min disaster prevent & control cofo, qingdao 266590, peoples r china ; [zeng, rong-chang ; hu, yan ; zhang, fen ; li, shuo-qi] shandong univ sci & technol, minist sci & technol, qingdao 266590, peoples r china ; [wang, zhen-lin] chongqing univ technol, sch mat sci & engn, chongqing 400054, peoples r china ; [huang, yuan-ding] zentrum mat & kustenforsch gmbh, magic magnesium innovat ctr, helmholtz zentrum geesthacht, d-21502 geesthacht, germany ; [han, en-hou] chinese acad sci, natl engn ctr corros control, inst met res, shenyang 110016, peoples r china
关键词	Az31 Magnesium Alloy Cerium Zinc Calcium Phosphate Chemical Conversion Coating Corrosion Resistance
资助者	National Natural Science Foundation of China [51571134]; SDUST Research Fund [2014TDJH104]; Joint Innovative Centre for Safe and Effective Mining Technology and Equipment of Coal Resources, Shandong Province, China; Natural Science Foundation of Chongqing, China [cstc2012jjA50034]
收录类别	sci
语种	英语
WOS记录号	WOS:000369696900018
引用统计	被引频次：70[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/74694
专题	中国科学院金属研究所
通讯作者	rczeng@foxmail.com
推荐引用方式 GB/T 7714	Zeng, Rong-chang,Hu, Yan,Zhang, Fen,et al. Corrosion resistance of cerium-doped zinc calcium phosphate chemical conversion coatings on AZ31 magnesium alloy[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2016,26(2):472-483.
APA	Zeng, Rong-chang.,Hu, Yan.,Zhang, Fen.,Huang, Yuan-ding.,Wang, Zhen-lin.,...&rczeng@foxmail.com.(2016).Corrosion resistance of cerium-doped zinc calcium phosphate chemical conversion coatings on AZ31 magnesium alloy.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,26(2),472-483.
MLA	Zeng, Rong-chang,et al."Corrosion resistance of cerium-doped zinc calcium phosphate chemical conversion coatings on AZ31 magnesium alloy".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 26.2(2016):472-483.