Failure of coatings formed by micro-arc oxidation on titanium under cathodic conditions in H2O2 solution

Failure of coatings formed by micro-arc oxidation on titanium under cathodic conditions in H2O2 solution

In the existing chemical stripping methods for micro-arc oxide (MAO) coatings, the application of strong acids (HF, HNO3) or alkali increases the difficulty in post-treatment for stripping solutions. In this study, the failure of MAO coatings on titanium under cathodic conditions was observed in a 6...

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Veröffentlicht in:Surface & coatings technology 2023-09, Vol.468, p.129738, Article 129738
Hauptverfasser: Ju, Kunyu, Zhao, Zhongwei
Format: Artikel
Sprache:eng
Schlagworte:
Electrochemical reduction
micro-arc oxidation
Oxide coatings
Peroxide
Titanium
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Zusammenfassung:In the existing chemical stripping methods for micro-arc oxide (MAO) coatings, the application of strong acids (HF, HNO3) or alkali increases the difficulty in post-treatment for stripping solutions. In this study, the failure of MAO coatings on titanium under cathodic conditions was observed in a 6 % H2O2 solution for the first time. The MAO coatings exfoliated from the TiO2/Ti interface in a visible form within 60 min at a pulsed voltage of 1.6 V (i 
ISSN:0257-8972
DOI:10.1016/j.surfcoat.2023.129738