Article: Formation and electrochemical behavior of Al and O plasma-implanted biodegradable Mg-Y-RE alloy

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Publisher Website: 10.1016/j.matchemphys.2011.11.028
Scopus: eid_2-s2.0-84355161840

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Title	Formation and electrochemical behavior of Al and O plasma-implanted biodegradable Mg-Y-RE alloy
Authors	Zhao, Y1 2 Wu, G2 Pan, H1 Yeung, KWK1 Chu, PK2
Issue Date	2012
Publisher	Elsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/matchemphys
Citation	Materials Chemistry and Physics, 2012, v. 132 n. 1, p. 187-191 [How to Cite?] DOI: http://dx.doi.org/10.1016/j.matchemphys.2011.11.028
Abstract	Mg-Y-RE alloy is potentially useful in biodegradable implants but the fast degradation rate in the physiological environment restrains actual applications. In order to enhance the corrosion resistance, aluminum and oxygen ion implantation is employed to modify the surface of the Mg-Y-RE alloy. X-ray photoelectron spectroscopy (XPS) is conducted to obtain elemental depth profiles and determine chemical state changes. Electrochemical impedance spectroscopy and potentiodynamic polarization are employed to investigate the electrochemical behavior in simulated body fluids (SBF). After polarization, the corroded surface is further studied by scanning electron microscopy (SEM). The results indicate Al and O ion implantation produces an Al 2O 3-containing protection layer which improves the corrosion resistance of Mg-Y-RE alloy. After the surface treatment, localized corrosion becomes the dominant corrosion mechanism instead of general corrosion. © 2011 Elsevier B.V.
ISSN	0254-0584 2011 Impact Factor: 2.234 2011 SCImago Journal Rankings: 0.146
DOI	http://dx.doi.org/10.1016/j.matchemphys.2011.11.028
References	References in Scopus

DC Field	Value
dc.contributor.author	Zhao, Y
dc.contributor.author	Wu, G
dc.contributor.author	Pan, H
dc.contributor.author	Yeung, KWK
dc.contributor.author	Chu, PK
dc.date.accessioned	2012-08-16T05:55:35Z
dc.date.available	2012-08-16T05:55:35Z
dc.date.issued	2012
dc.description.abstract	Mg-Y-RE alloy is potentially useful in biodegradable implants but the fast degradation rate in the physiological environment restrains actual applications. In order to enhance the corrosion resistance, aluminum and oxygen ion implantation is employed to modify the surface of the Mg-Y-RE alloy. X-ray photoelectron spectroscopy (XPS) is conducted to obtain elemental depth profiles and determine chemical state changes. Electrochemical impedance spectroscopy and potentiodynamic polarization are employed to investigate the electrochemical behavior in simulated body fluids (SBF). After polarization, the corroded surface is further studied by scanning electron microscopy (SEM). The results indicate Al and O ion implantation produces an Al 2O 3-containing protection layer which improves the corrosion resistance of Mg-Y-RE alloy. After the surface treatment, localized corrosion becomes the dominant corrosion mechanism instead of general corrosion. © 2011 Elsevier B.V.
dc.description.nature	Link_to_subscribed_fulltext
dc.identifier.citation	Materials Chemistry and Physics, 2012, v. 132 n. 1, p. 187-191 [How to Cite?] DOI: http://dx.doi.org/10.1016/j.matchemphys.2011.11.028
dc.identifier.citeulike	10128008
dc.identifier.doi	http://dx.doi.org/10.1016/j.matchemphys.2011.11.028
dc.identifier.epage	191
dc.identifier.hkuros	204534
dc.identifier.issn	0254-0584 2011 Impact Factor: 2.234 2011 SCImago Journal Rankings: 0.146
dc.identifier.issue	1
dc.identifier.scopus	eid_2-s2.0-84355161840
dc.identifier.spage	187
dc.identifier.uri	http://hdl.handle.net/10722/159755
dc.identifier.volume	132
dc.language	eng
dc.publisher	Elsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/matchemphys
dc.publisher.place	Switzerland
dc.relation.ispartof	Materials Chemistry and Physics
dc.relation.references	References in Scopus
dc.subject.mesh	Chemical state changes
dc.subject.mesh	Corroded surface
dc.subject.mesh	Corrosion mechanisms
dc.subject.mesh	Degradation rate
dc.subject.mesh	Depth profile
dc.title	Formation and electrochemical behavior of Al and O plasma-implanted biodegradable Mg-Y-RE alloy
dc.type	Article

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Author Affiliations

The University of Hong Kong
City University of Hong Kong

Article: Formation and electrochemical behavior of Al and O plasma-implanted biodegradable Mg-Y-RE alloy

The HKU Scholars Hub has contact details for these author(s).