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Evaluation of coatings for mg alloys for biomedical applications

Abidin, Nor Ishida Zainal, Da Forno, Anna, Bestetti, Massimiliano, Martin, Darren, Beer, Aiden and Atrens, Andrej 2015, Evaluation of coatings for mg alloys for biomedical applications, Advanced engineering materials, vol. 17, no. 1, pp. 58-67, doi: 10.1002/adem.201300516.

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Title Evaluation of coatings for mg alloys for biomedical applications
Author(s) Abidin, Nor Ishida Zainal
Da Forno, Anna
Bestetti, Massimiliano
Martin, Darren
Beer, Aiden
Atrens, Andrej
Journal name Advanced engineering materials
Volume number 17
Issue number 1
Start page 58
End page 67
Total pages 10
Publisher Wiley
Place of publication London, Eng.
Publication date 2015-01
ISSN 1438-1656
1527-2648
Keyword(s) Science & Technology
Technology
Materials Science, Multidisciplinary
Materials Science
AZ91D MAGNESIUM ALLOY
HIGH-PURITY MG
ZN-CA ALLOY
CORROSION PROTECTION
IN-VIVO
STAINLESS-STEELS
HANKS SOLUTION
PASSIVE FILMS
NACL SOLUTION
MECHANICAL-PROPERTIES
Summary The aim of this work was to assess a number of coatings developed for Mg for biomedical applications. The Mg substrates were high-purity (HP) Mg and ME10, an alloy recently developed for improved extrudability. The research utilized the new fishing-line specimen configuration to allow direct comparison to our recent in vivo and in vitro measurements. The in vitro measurements were immersion tests of fishing-line specimens immersed in Nor's solution at 37 °C. Tests of substantial duration are needed because the corrosion rates of uncoated samples are low. Nor's solution is the designation given to Hank's solution through which CO2 is bubbled at a partial pressure of 0.009 atm. In this solution, pH is maintained constant by the interaction of CO2 and the bicarbonate ions in the solution. This is the same buffer as that which maintains the pH of blood. Coatings examined were: (i) an anodization using a bio-friendly alkaline electrolyte consisting of phosphate, borate, and metasilicate, (ii) octyltrimethoxysilane (OSi), (iii) 1,2-bis[triethoxysilyl]ethane (BTSE), (iv) anodization+OSi, and (v) anodization + BTSE. The performance of coated samples was comparable to or better than that of the uncoated samples, and there was a substantially better performance for the ME10 samples after anodization+OSi. Reasons for the various performances are discussed.
Language eng
DOI 10.1002/adem.201300516
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861199 Basic Metal Products (incl. Smelting
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Wiley
Persistent URL http://hdl.handle.net/10536/DRO/DU:30073815

Document type: Journal Article
Collection: Institute for Frontier Materials
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