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Article: Corrosion behavior on orthopedic NiTi alloy with nanocrystalline/amorphous surface

TitleCorrosion behavior on orthopedic NiTi alloy with nanocrystalline/amorphous surface
Authors
KeywordsAlloys
Corrosion
Hardness
Nanostructures
Issue Date2011
PublisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/matchemphys
Citation
Materials Chemistry And Physics, 2011, v. 126 n. 1-2, p. 102-107 How to Cite?
AbstractIn order to enhance the surface wear resistance and nitrogen diffusion during plasma treatment, orthopedic NiTi alloy is subjected to surface mechanical attrition treatment (SMAT) and a nanocrystalline and partial amorphous structure is fabricated in the surface layer. It is found that hardness in the surface layer is notably improved. The corrosion behavior is systematically studied in a 0.9% NaCl physiological solution by electrochemical methods. Potentiodynamic polarization measurements indicate that the corrosion resistance of SMAT NiTi with the surface nanocrystalline and partial amorphous structure is significantly enhanced compared to the bare NiTi with coarse grains. Both corrosion potential (E corr) measurements and electrochemical impedance spectroscopy (EIS) reveal that a passive oxide layer is readily formed on the SMAT NiTi during early immersion in the 0.9% NaCl solution. When the passive oxide layer has stabilized after long exposure in the 0.9% NaCl solution, corrosion induced by Cl - begins to degrade the passive oxide film. The observed corrosion behavior of SMAT NiTi is considered to be associated with the surface nanocrystalline and amorphous structure. © 2010 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/139551
ISSN
2015 Impact Factor: 2.101
2015 SCImago Journal Rankings: 0.733
ISI Accession Number ID
Funding AgencyGrant Number
City University of Hong Kong7008009
Funding Information:

This work was supported by City University of Hong Kong Strategic Research Grant (SRG) No. 7008009. T. Hu is grateful for the valuable discussion with Mr. K. Feng and Mr. X. M. Zhang who is from Harbin Institute of Technology.

References

 

DC FieldValueLanguage
dc.contributor.authorHu, Ten_HK
dc.contributor.authorXin, YCen_HK
dc.contributor.authorWu, SLen_HK
dc.contributor.authorChu, CLen_HK
dc.contributor.authorLu, Jen_HK
dc.contributor.authorGuan, Len_HK
dc.contributor.authorChen, HMen_HK
dc.contributor.authorHung, TFen_HK
dc.contributor.authorYeung, KWKen_HK
dc.contributor.authorChu, PKen_HK
dc.date.accessioned2011-09-23T05:51:35Z-
dc.date.available2011-09-23T05:51:35Z-
dc.date.issued2011en_HK
dc.identifier.citationMaterials Chemistry And Physics, 2011, v. 126 n. 1-2, p. 102-107en_HK
dc.identifier.issn0254-0584en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139551-
dc.description.abstractIn order to enhance the surface wear resistance and nitrogen diffusion during plasma treatment, orthopedic NiTi alloy is subjected to surface mechanical attrition treatment (SMAT) and a nanocrystalline and partial amorphous structure is fabricated in the surface layer. It is found that hardness in the surface layer is notably improved. The corrosion behavior is systematically studied in a 0.9% NaCl physiological solution by electrochemical methods. Potentiodynamic polarization measurements indicate that the corrosion resistance of SMAT NiTi with the surface nanocrystalline and partial amorphous structure is significantly enhanced compared to the bare NiTi with coarse grains. Both corrosion potential (E corr) measurements and electrochemical impedance spectroscopy (EIS) reveal that a passive oxide layer is readily formed on the SMAT NiTi during early immersion in the 0.9% NaCl solution. When the passive oxide layer has stabilized after long exposure in the 0.9% NaCl solution, corrosion induced by Cl - begins to degrade the passive oxide film. The observed corrosion behavior of SMAT NiTi is considered to be associated with the surface nanocrystalline and amorphous structure. © 2010 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_US
dc.publisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/matchemphysen_HK
dc.relation.ispartofMaterials Chemistry and Physicsen_HK
dc.subjectAlloysen_HK
dc.subjectCorrosionen_HK
dc.subjectHardnessen_HK
dc.subjectNanostructuresen_HK
dc.titleCorrosion behavior on orthopedic NiTi alloy with nanocrystalline/amorphous surfaceen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0254-0584&volume=126&issue=1-2&spage=102&epage=107&date=2011&atitle=Corrosion+behavior+on+orthopedic+NiTi+alloy+with+nanocrystalline/amorphous+surface-
dc.identifier.emailYeung, KWK:wkkyeung@hkucc.hku.hken_HK
dc.identifier.authorityYeung, KWK=rp00309en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.matchemphys.2010.11.061en_HK
dc.identifier.scopuseid_2-s2.0-78751615179en_HK
dc.identifier.hkuros192184en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-78751615179&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume126en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage102en_HK
dc.identifier.epage107en_HK
dc.identifier.isiWOS:000287349600018-
dc.publisher.placeSwitzerlanden_HK
dc.identifier.scopusauthoridHu, T=25948400300en_HK
dc.identifier.scopusauthoridXin, YC=16053620900en_HK
dc.identifier.scopusauthoridWu, SL=15125218800en_HK
dc.identifier.scopusauthoridChu, CL=7404345713en_HK
dc.identifier.scopusauthoridLu, J=26654803800en_HK
dc.identifier.scopusauthoridGuan, L=35770842700en_HK
dc.identifier.scopusauthoridChen, HM=36930012900en_HK
dc.identifier.scopusauthoridHung, TF=7103293856en_HK
dc.identifier.scopusauthoridYeung, KWK=13309584700en_HK
dc.identifier.scopusauthoridChu, PK=36040705700en_HK

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