Tribo-Corrosion behaviour of TiCxOy thin films in bio fluids

Mathew T Mathew, E. Ariza, L.A. Rocha, F. Vaz, A.C. Fernandes, Margaret Stack

Research output: Contribution to journalArticle

33 Citations (Scopus)
196 Downloads (Pure)

Abstract

In recent years, the development of thin film systems for decorative applications has attracted significant attention in scientific research. These decorative coatings require, not only an attractive appearance for market applications, but also an ability to protect the surface underneath. Because of this, corrosion, wear and their combined effects (termed tribo-corrosion) are particularly important for lifetime prediction. The tribo-corrosion behaviour of a range of single layered titanium oxycarbide, TiCxOy,coatings, produced by DC reactive magnetron sputtering, has been studied and reported as a function of electrode potential (-0.9 V, -0.5 V, 0.0 V and +0.5 V) and applied load (3, 6 and 9 N). The study was conducted in a reciprocating sliding tribosystem (Plint TE 67/E) in a bio fluid (an artificial perspiration solution) at room temperature. During the wear tests, both the open-circuit potential and the corrosion current were monitored. The results showed that electrode potential and load have a significant influence on the total material loss. The variations in Rp (polarization resistance) and Cf(capacitance) before and after sliding, obtained by Electrochemical Impedance Spectroscopy (EIS) were evaluated in order to provide an understanding of the resistance of the film in such conditions. Tribo-corrosion maps were generated, based on the results, indicating the change in mechanisms of the tribological and corrosion parameters for such coatings.
Original languageEnglish
Pages (from-to)929-937
Number of pages9
JournalElectrochimica Acta
Volume56
Issue number2
Early online date16 Sep 2010
DOIs
Publication statusPublished - 30 Dec 2010

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Corrosion
Thin films
Fluids
Coatings
Wear of materials
Electrodes
Reactive sputtering
Titanium
Electrochemical impedance spectroscopy
Magnetron sputtering
Capacitance
Polarization
Networks (circuits)
Temperature

Keywords

  • tribo-corrosion
  • applied load
  • electrode potential
  • electrochemical impedance spectroscopy
  • synergism.

Cite this

Mathew, M. T., Ariza, E., Rocha, L. A., Vaz, F., Fernandes, A. C., & Stack, M. (2010). Tribo-Corrosion behaviour of TiCxOy thin films in bio fluids. Electrochimica Acta, 56(2), 929-937. https://doi.org/10.1016/j.electacta.2010.08.067
Mathew, Mathew T ; Ariza, E. ; Rocha, L.A. ; Vaz, F. ; Fernandes, A.C. ; Stack, Margaret. / Tribo-Corrosion behaviour of TiCxOy thin films in bio fluids. In: Electrochimica Acta. 2010 ; Vol. 56, No. 2. pp. 929-937.
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Mathew, MT, Ariza, E, Rocha, LA, Vaz, F, Fernandes, AC & Stack, M 2010, 'Tribo-Corrosion behaviour of TiCxOy thin films in bio fluids', Electrochimica Acta, vol. 56, no. 2, pp. 929-937. https://doi.org/10.1016/j.electacta.2010.08.067

Tribo-Corrosion behaviour of TiCxOy thin films in bio fluids. / Mathew, Mathew T; Ariza, E.; Rocha, L.A.; Vaz, F.; Fernandes, A.C.; Stack, Margaret.

In: Electrochimica Acta, Vol. 56, No. 2, 30.12.2010, p. 929-937.

Research output: Contribution to journalArticle

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T1 - Tribo-Corrosion behaviour of TiCxOy thin films in bio fluids

AU - Mathew, Mathew T

AU - Ariza, E.

AU - Rocha, L.A.

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AU - Fernandes, A.C.

AU - Stack, Margaret

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