Volume 6, Issue 22 (12-2016)
مهندسی خوردگی 2016, 6(22): 19-30 |
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The Effect of Fluoride Ion on the Pitting Corrosion of NiTi and NiTiNb Orthodontic Archwires in Chloride Solution. مهندسی خوردگی 2016; 6 (22) :19-30
URL: http://journal.ica.ir/article-1-135-en.html
URL: http://journal.ica.ir/article-1-135-en.html
Abstract: (262 Views)
Using fluoride mouth washes is recommended to protect the teeth during orthodontic treatment. Therefore it is important to investigate the effect of fluoride ion on the pitting corrosion of orthodontic archwires. The aim of this study is to investigate the effect of fluoride ion on the corrosion behaviour of NiTi and NiTiNb orthodontic archwires in chloride solution by means of potentiodynamic and potentiostatic polarysation techniques. Results revealed that NiTi orthodontic wire is susceptible to pitting corrosion in chloride solution. Fluoride ion was found to have an inhibition effect and its addition increases the pitting potential for NiTi wire. The pitting potential increases also by increment in the F-/Cl- concentration ratio. NiTiNb orthodontic archwire shows passivity behaviour in sole fluoride solutions; however, its pitting corrosion was observed in solution containing both chloride and fluoride ions.
Keywords: Pitting corrosion, Chloride ion, Fluoride ion, NiTi orthodontic archwire, NiTiNb orthodontic archwire
Type of Study: Research |
Subject:
General
Received: 2022/11/25 | Accepted: 2016/12/30 | Published: 2016/12/30
Received: 2022/11/25 | Accepted: 2016/12/30 | Published: 2016/12/30
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