Corrosion behaviour of Ti6Al4V alloy in artificial saliva solution with fluoride content and low pH value: Korrosionsverhalten der Legierung Ti6Al4V in künstlicher Speichelflüssigkeit mit Fluoridanteilen und geringem pH-Wert

C. Vitelaru, N. Ghiban, A. C. Parau, M. Balaceanu, F. Miculescu, A. Vladescu

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The corrosion resistance of the Ti6Al4V alloy in Carter-Brugirard artificial saliva (pH = 5.2), in saliva with sodium fluoride (NaF) addition (pH = 5.2) and in saliva with NaF and lactic acid (pH = 2.0) was evaluated. The open circuit potential of the alloy in all electrolytes was stable after approximately 2 h of immersion. Higher corrosion rate and lower polarization resistance were measured for the alloy immersed in fluoridated saliva, compared to genuine saliva, indicating that the addition of NaF lead to a worse corrosion resistance. In fluoridated and acidified saliva (pH = 2), the Ti6Al4V alloy exhibited the lowest corrosion resistance. The corroded surfaces are much rougher than those non-corroded. A higher roughness was obtained for the alloy immersed in saliva with NaF and low pH, indicating that the corrosion process was more active in this electrolyte. Large precipitates of corrosion products and corrosive sites were found on the samples immersed in all electrolytes.

Original languageEnglish
Pages (from-to)91-98
Number of pages8
JournalMaterialwissenschaft und Werkstofftechnik
Volume45
Issue number2
DOIs
Publication statusPublished - 1 Feb 2014
Externally publishedYes

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Keywords

  • Carter-Brugirard artificial saliva
  • corrosion resistance
  • roughness
  • Ti6Al4V

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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