Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/18720
Title: Effect of post-weld heat-treatment on the oxide film and corrosion behaviour of laser-welded shape memory NiTi wires
Authors: Chan, CW
Man, HC 
Yue, TM 
Keywords: Intermetallics
EIS
XPS
Passive films
Pitting corrosion
Welding
Issue Date: 2012
Source: Corrosion science, 2012, v. 56, p. 158-167 How to cite?
Journal: Corrosion Science 
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 TiO 2, together with some Ti, TiO, and Ti 2O 3. 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.
URI: http://hdl.handle.net/10397/18720
ISSN: 0010-938X
DOI: 10.1016/j.corsci.2011.11.020
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