Tribocorrosion behaviour of bio-functionalized porous Ti surfaces obtained by two-step anodic treatment

[Display omitted] •Hierarchical porous structure with tailored chemical composition was obtained by a facile two-step anodic treatment.•Hierarchical surfaces presented improved wettability, corrosion and tribocorrosion resistance.•Wear-corrosion mechanisms involved in each bio-functionalization step...

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Bibliographic Details
Published in:Corrosion science 2020-04, Vol.166 (C), p.108467, Article 108467
Main Authors: Costa, A.I., Sousa, L., Alves, A.C., Toptan, F.
Format: Article
Language:English
Subjects:
Anatase
Anodic treatment
Corrosion
Micro-arc oxidation (MAO)
Oxidation
Porosity
Titanium
Tribocorrosion
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Summary:[Display omitted] •Hierarchical porous structure with tailored chemical composition was obtained by a facile two-step anodic treatment.•Hierarchical surfaces presented improved wettability, corrosion and tribocorrosion resistance.•Wear-corrosion mechanisms involved in each bio-functionalization step is discussed. A bio-functionalized porous surface was obtained on Ti by a two-step anodic treatment and its corrosion and tribocorrosion behaviour were evaluated. The first-step provided macro-porosity while the second-step, a bio-functionalization process by micro-arc oxidation (MAO), provided an oxide layer (anatase + rutile) with micro-pores and bio-active elements (Ca + P). Corrosion and tribocorrosion behaviour were improved due to the protective role given by the oxide layer formed on the second-step. Tribocorrosion mechanisms for the bio-functionalized porous structures are presented.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2020.108467