Abstract
The influence of pre-anodising in sulphuric and phosphoric acids on energy efficiency of voltage-controlled PEO process of three commercial wrought and cast aluminium alloys (AA1050, AA6082 and A356) has been investigated. The precursor anodic porous films enable up to 57% energy savings during PEO and produce ∼35-40% increase of the coating microhardness compared with direct PEO. Total specific energy consumption values of 2.5-2.7 kW h m-2 μm-1 and 3.1-3.8 kW h m-2 μm-1 were achieved using phosphoric and sulphuric acid-formed precursors, respectively.
Original language | English |
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Pages (from-to) | 13-16 |
Number of pages | 4 |
Journal | Materials Letters |
Volume | 127 |
DOIs | |
Publication status | Published - 15 Jul 2014 |
Keywords
- Metals and alloys
- Oxidation
- Thick films