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Effects of K 2 TiF 6 and Electrolyte Temperatures on Energy Consumption and Properties of MAO Coatings on 6063 Aluminum Alloy.
- Source :
-
Materials (Basel, Switzerland) [Materials (Basel)] 2023 Feb 23; Vol. 16 (5). Date of Electronic Publication: 2023 Feb 23. - Publication Year :
- 2023
-
Abstract
- To decrease energy consumption and improve the performance of micro-arc oxidation (MAO) films on 6063 Al alloy, a policy of K <subscript>2</subscript> TiF <subscript>6</subscript> additive and electrolyte temperature control was adapted. The specific energy consumption relied on the K <subscript>2</subscript> TiF <subscript>6</subscript> additive and more particularly on the electrolyte temperatures. Scanning electron microscopy demonstrates that electrolytes with 5 g/L K <subscript>2</subscript> TiF <subscript>6</subscript> can effectively seal the surface pores and increase the thickness of the compact inner layer. Spectral analysis shows that the surface oxide coating consists of γ-Al <subscript>2</subscript> O <subscript>3</subscript> phase. Following 336 h of the total immersion process, the impedance modulus of the oxidation film, prepared at 25 °C (Ti5-25), remained 1.08 × 10 <superscript>6</superscript> Ω·cm <superscript>2</superscript> . Moreover, Ti5-25 has the best performance/energy-consumption ratio with a compact inner layer (2.5 ± 0.3 μm). This research found that the time of the big arc stage increased with the temperature, resulting in producing more internal defects in the film. In this work, we employ a dual-track strategy of additive and temperature providing an avenue to reduce the energy consumption of MAO on alloys.
Details
- Language :
- English
- ISSN :
- 1996-1944
- Volume :
- 16
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Materials (Basel, Switzerland)
- Publication Type :
- Academic Journal
- Accession number :
- 36902945
- Full Text :
- https://doi.org/10.3390/ma16051830