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Advances in Materials Science and Engineering
Volume 2013 (2013), Article ID 738954, 8 pages
http://dx.doi.org/10.1155/2013/738954
Research Article

Susceptibility to Stress Corrosion of Laser-Welded Composite Arch Wire in Acid Artificial Saliva

Orthodontic Department, Jilin University, No. 1500 Qinghua Street, Changchun 130021, China

Received 21 January 2013; Revised 22 May 2013; Accepted 30 May 2013

Academic Editor: Hamdy Doweidar

Copyright © 2013 Chao Zhang and Xinhua Sun. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The corrosion resistance of laser-welded composite arch wire (CoAW) with Cu interlayer between NiTi shape memory alloy and stainless steel wire in artificial saliva with different acidities and loads was studied. It was found that both the solution pH and the stress had a significant influence on the corrosion behaviors of the CoAW samples. Decreasing the solution pH or increasing the loading stress caused the increase of Cu release and weight loss. The corroded morphology formed on the surfaces of the CoAW was the consequence under the combined effect of corrosion and stress.