Abstract
Porous anodic films formed on aluminium in sulphuric acid were post-treated using various double-dip processes that incorporate a sparingly-soluble, vanadate, corrosion inhibitor. The processes were optimised by investigating the effects of the double-dip order, the rinsing step, the immersion time and the double-dip method. The optimised processes were applied to AA 2024-T3 alloy, which was then exposed to salt spray. V-Ce(III) and V-Zn processes provided corrosion protection similar to that of sealed, sulphuric acid-formed films. A V-Ni process provided increased protection, similar to that of hot water sealed films formed in chromic acid.
| Original language | English |
|---|---|
| Pages (from-to) | 137-144 |
| Number of pages | 8 |
| Journal | Transactions of the Institute of Metal Finishing |
| Volume | 96 |
| Issue number | 3 |
| Early online date | 11 Apr 2018 |
| DOIs | |
| Publication status | Published - 2018 |
Keywords
- alloy
- Aluminium
- anodic films
- anodising
- inhibitor