Corrosion behavior of laser-oxidized NiTi in Hanks' solution

M. H. Wong; F. T. Cheng; Hau Chung Man

Corrosion behavior of laser-oxidized NiTi in Hanks' solution

M. H. Wong, F. T. Cheng, Hau Chung Man

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

Abstract

NiTi was surface treated with a pulsed Nd:YAG laser to accomplish oxidation without melting. The oxide layer was characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) to obtain information on the thickness, morphology, and the composition profile. The oxide layer was about 25 nm thick with an average surface roughness (Ra) of about 13 nm. The corrosion behavior of the laser oxidized sample and the untreated sample was studied using electrochemical impedance spectroscopy (EIS) at open-circuit potential and cyclic polarization test in Hanks' solution at 37 °C. EIS results indicated that the polarization resistance of the laser oxidized sample was about 15.8 times that of the untreated sample while cyclic polarization tests similarly recorded reduction of the passive current density for the laser oxidized sample by an order of magnitude.

Original language	English
Title of host publication	ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics, Congress Proceedings
Publication status	Published - 1 Dec 2006
Event	ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics - Scottsdale, AZ, United States Duration: 30 Oct 2006 → 2 Nov 2006

Conference

Conference	ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics
Country/Territory	United States
City	Scottsdale, AZ
Period	30/10/06 → 2/11/06

ASJC Scopus subject areas

Geochemistry and Petrology
Electrical and Electronic Engineering

Cite this

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title = "Corrosion behavior of laser-oxidized NiTi in Hanks' solution",

abstract = "NiTi was surface treated with a pulsed Nd:YAG laser to accomplish oxidation without melting. The oxide layer was characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) to obtain information on the thickness, morphology, and the composition profile. The oxide layer was about 25 nm thick with an average surface roughness (Ra) of about 13 nm. The corrosion behavior of the laser oxidized sample and the untreated sample was studied using electrochemical impedance spectroscopy (EIS) at open-circuit potential and cyclic polarization test in Hanks' solution at 37 °C. EIS results indicated that the polarization resistance of the laser oxidized sample was about 15.8 times that of the untreated sample while cyclic polarization tests similarly recorded reduction of the passive current density for the laser oxidized sample by an order of magnitude.",

author = "Wong, {M. H.} and Cheng, {F. T.} and Man, {Hau Chung}",

year = "2006",

month = dec,

day = "1",

language = "English",

booktitle = "ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics, Congress Proceedings",

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Corrosion behavior of laser-oxidized NiTi in Hanks' solution. / Wong, M. H.; Cheng, F. T.; Man, Hau Chung.
ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics, Congress Proceedings. 2006. M404.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

TY - GEN

T1 - Corrosion behavior of laser-oxidized NiTi in Hanks' solution

AU - Wong, M. H.

AU - Cheng, F. T.

AU - Man, Hau Chung

PY - 2006/12/1

Y1 - 2006/12/1

N2 - NiTi was surface treated with a pulsed Nd:YAG laser to accomplish oxidation without melting. The oxide layer was characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) to obtain information on the thickness, morphology, and the composition profile. The oxide layer was about 25 nm thick with an average surface roughness (Ra) of about 13 nm. The corrosion behavior of the laser oxidized sample and the untreated sample was studied using electrochemical impedance spectroscopy (EIS) at open-circuit potential and cyclic polarization test in Hanks' solution at 37 °C. EIS results indicated that the polarization resistance of the laser oxidized sample was about 15.8 times that of the untreated sample while cyclic polarization tests similarly recorded reduction of the passive current density for the laser oxidized sample by an order of magnitude.

AB - NiTi was surface treated with a pulsed Nd:YAG laser to accomplish oxidation without melting. The oxide layer was characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) to obtain information on the thickness, morphology, and the composition profile. The oxide layer was about 25 nm thick with an average surface roughness (Ra) of about 13 nm. The corrosion behavior of the laser oxidized sample and the untreated sample was studied using electrochemical impedance spectroscopy (EIS) at open-circuit potential and cyclic polarization test in Hanks' solution at 37 °C. EIS results indicated that the polarization resistance of the laser oxidized sample was about 15.8 times that of the untreated sample while cyclic polarization tests similarly recorded reduction of the passive current density for the laser oxidized sample by an order of magnitude.

UR - http://www.scopus.com/inward/record.url?scp=56749133210&partnerID=8YFLogxK

M3 - Conference article published in proceeding or book

BT - ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics, Congress Proceedings

T2 - ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics

Y2 - 30 October 2006 through 2 November 2006

ER -

Corrosion behavior of laser-oxidized NiTi in Hanks' solution

Abstract

Conference

ASJC Scopus subject areas

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