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Influence of different modes of microarc oxidation of titanium on the electrochemical properties and surface morphology of the obtained coatings
- Source :
- Surface Engineering; March 2023, Vol. 39 Issue: 3 p295-306, 12p
- Publication Year :
- 2023
-
Abstract
- ABSTRACTThe influence of Microarc Oxidation (MAO) modes of titanium substrate in electrolytes of the original composition is investigated. Used electrolytes no contain sodium silicate but includes nickel sulphate, sodium aluminate and alkali. The morphology and composition of the obtained coatings were studied by electron microscopy. The electrochemical behaviour was studied using polarisation curves and electrochemical impedance spectroscopy (EIS). Proposed Equivalent circuits are adequately corresponded to experimental EIS data with no more 6% error. The dependence between the elements of the Equivalent circuits and the morphological characteristics depending on the processing is considered. It is shown that MAO coatings on titanium have high corrosion resistance in an aggressive sulphuric acid. The electrochemical properties of coatings undergo irreversible changes in the direction of deterioration after anodic polarisation. It has been established that nickel doping of MAO coatings on titanium does not allow them to serve as anode materials.
Details
- Language :
- English
- ISSN :
- 02670844 and 17432944
- Volume :
- 39
- Issue :
- 3
- Database :
- Supplemental Index
- Journal :
- Surface Engineering
- Publication Type :
- Periodical
- Accession number :
- ejs63470364
- Full Text :
- https://doi.org/10.1080/02670844.2023.2223451