|A novel biodegradable nicotinic acid/calcium phosphate composite coating on Mg-3Zn alloy|
|Y. W. Song; D. Y. Shan; E. H. Han
|Source Publication||Materials Science & Engineering C-Materials for Biological Applications
|Abstract||A 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.|
; 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.
Az91d Magnesium Alloy
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.
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.
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.
|Files in This Item:||
||There are no files associated with this item.
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.