ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 20    Special 2    July 2010

[PDF]    [Flash]
Preparation of calcium phosphate coatings on Mg-1.0Ca alloy
ZHANG Chun-yan(张春艳)1, 3, ZENG Rong-chang(曾荣昌)1, CHEN Rong-shi(陈荣石)2,
 LIU Cheng-long(刘成龙)1, GAO Jia-cheng(高家诚)3
(1. School of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400050, China;
2. Environmental Corrosion Center, Institute of Metal Research, Chinese Academy of Sciences,
 Shenyang 110016, China;
3. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
)
Abstract: The calcium phosphate coatings were prepared by virtue of electrochemical deposition in order to improve the corrosion resistance of Mg-1.0Ca alloys in simulated body fluids. The chemical compositions, structures and morphologies of the coatings were investigated by energy dispersive spectroscopy (EDS), X-ray diffractometry (XRD) and scanning electron microscopy (SEM), respectively. The potentiodynamic electrochemical technique was employed to investigate the bio-degradation behavior of Mg-1.0Ca alloys with Ca-P coatings in Hank’s solutions. The experimental results show that the deposited coatings predominately consist of flake-shape brushite (DCPD, CaHPO4·2H2O) crystallites. The corrosion resistance of the substrates with coatings is improved in Hank’s solutions significantly.
Key words: coating; magnesium alloy; corrosion; biomaterials; simulated body fluids
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
Managed by Central South University (CSU) 湘ICP备09001153号-9