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A novel biodegradable nicotinic acid/calcium phosphate composite coating on Mg-3Zn alloy
Y. W. Song; D. Y. Shan; E. H. Han
2013
Source PublicationMaterials Science & Engineering C-Materials for Biological Applications
ISSN0928-4931
Volume33Issue:1Pages:78-84
AbstractA novel biodegradable composite coating is prepared to reduce the biodegradation rate of Mg-3Zn alloy. The Mg-3Zn substrate is first immersed into 0.02 mol L-1 nicotinic acid (NA) solution, named as vitamin B-3, to obtain a pretreatment film, and then the electrodeposition of calcium phosphate coating with ultrasonic agitation is carried out on the NA pretreatment film to obtain a NA/calcium phosphate composite coating. Surface morphology is observed by scanning electron microscopy (SEM). Chemical composition is determined by X-ray diffraction (XRD) and EDX. Protection property of the coatings is evaluated by electrochemical tests. The biodegradable behavior is investigated by immersion tests. The results indicate that a thin but compact bottom layer can be obtained by NA pretreatment. The electrodeposition calcium phosphate coating consists of many flake particles and ultrasonic agitation can greatly improve the compactness of the coating. The composite coating is biodegradable and can reduce the biodegradation rate of Mg alloys in stimulated body fluid (SBF) for twenty times. The biodegradation process of the composite coating can be attributed to the gradual dissolution of the flake particles into chippings. (c) 2012 Elsevier B.V. All rights reserved.
description.department[song, yingwei ; shan, dayong ; han, en-hou] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; song, yw (reprint author), chinese acad sci, inst met res, state key lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china. ; ywsong@imr.ac.cn
KeywordNicotinic Acid Electrodeposition Calcium Phosphate Mg-3zn Alloy Biodegradable Coating Az91d Magnesium Alloy Calcium-phosphate In-vitro Corrosion Bone
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71468
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Y. W. Song,D. Y. Shan,E. H. Han. A novel biodegradable nicotinic acid/calcium phosphate composite coating on Mg-3Zn alloy[J]. Materials Science & Engineering C-Materials for Biological Applications,2013,33(1):78-84.
APA Y. W. Song,D. Y. Shan,&E. H. Han.(2013).A novel biodegradable nicotinic acid/calcium phosphate composite coating on Mg-3Zn alloy.Materials Science & Engineering C-Materials for Biological Applications,33(1),78-84.
MLA Y. W. Song,et al."A novel biodegradable nicotinic acid/calcium phosphate composite coating on Mg-3Zn alloy".Materials Science & Engineering C-Materials for Biological Applications 33.1(2013):78-84.
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