Effect of post-weld heat-treatment on the oxide film and corrosion behaviour of laser-welded shape memory NiTi wires

C. W. Chan; Hau Chung Man; Tai Man Yue

doi:10.1016/j.corsci.2011.11.020

Effect of post-weld heat-treatment on the oxide film and corrosion behaviour of laser-welded shape memory NiTi wires

C. W. Chan, Hau Chung Man, Tai Man Yue

Research output: Journal article publication › Journal article › Academic research › peer-review

56 Citations (Scopus)

Abstract

Post-weld heat-treatment (PWHT) was applied to NiTi weldments to improve the corrosion behaviour by modifying the microstructure and surface composition. The surface oxide film on the weldments is principally TiO2, together with some Ti, TiO, and Ti2O3. The surface Ti/Ni ratio of the weldments after PWHT is increased. The oxide film formed in Hanks' solution is thicker on the weldments after PWHT. The pitting resistance of the weldments is increased by PWHT. The galvanic effect in the weldments is very small. The weldment with PWHT at 350°C shows the best corrosion resistance among other heat-treated weldments in this study.

Original language	English
Pages (from-to)	158-167
Number of pages	10
Journal	Corrosion Science
Volume	56
DOIs	https://doi.org/10.1016/j.corsci.2011.11.020
Publication status	Published - 1 Mar 2012

Keywords

A. Intermetallics
B. EIS
B. XPS
C. Passive films
C. Pitting corrosion
C. Welding

ASJC Scopus subject areas

General Materials Science
General Chemical Engineering
General Chemistry

More information

10.1016/j.corsci.2011.11.020

Cite this

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title = "Effect of post-weld heat-treatment on the oxide film and corrosion behaviour of laser-welded shape memory NiTi wires",

abstract = "Post-weld heat-treatment (PWHT) was applied to NiTi weldments to improve the corrosion behaviour by modifying the microstructure and surface composition. The surface oxide film on the weldments is principally TiO2, together with some Ti, TiO, and Ti2O3. The surface Ti/Ni ratio of the weldments after PWHT is increased. The oxide film formed in Hanks' solution is thicker on the weldments after PWHT. The pitting resistance of the weldments is increased by PWHT. The galvanic effect in the weldments is very small. The weldment with PWHT at 350°C shows the best corrosion resistance among other heat-treated weldments in this study.",

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AU - Chan, C. W.

AU - Man, Hau Chung

AU - Yue, Tai Man

PY - 2012/3/1

Y1 - 2012/3/1

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AB - Post-weld heat-treatment (PWHT) was applied to NiTi weldments to improve the corrosion behaviour by modifying the microstructure and surface composition. The surface oxide film on the weldments is principally TiO2, together with some Ti, TiO, and Ti2O3. The surface Ti/Ni ratio of the weldments after PWHT is increased. The oxide film formed in Hanks' solution is thicker on the weldments after PWHT. The pitting resistance of the weldments is increased by PWHT. The galvanic effect in the weldments is very small. The weldment with PWHT at 350°C shows the best corrosion resistance among other heat-treated weldments in this study.

KW - A. Intermetallics

KW - B. EIS

KW - B. XPS

KW - C. Passive films

KW - C. Pitting corrosion

KW - C. Welding

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U2 - 10.1016/j.corsci.2011.11.020

DO - 10.1016/j.corsci.2011.11.020

M3 - Journal article

SN - 0010-938X

VL - 56

SP - 158

EP - 167

JO - Corrosion Science

JF - Corrosion Science

ER -

Effect of post-weld heat-treatment on the oxide film and corrosion behaviour of laser-welded shape memory NiTi wires

Abstract

Keywords

ASJC Scopus subject areas

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