Abstract
In the present study, the effects of surface pretreatments of AA2024 aluminium alloy on the corrosion protection of the alloy using a sol-gel coating were investigated. It was revealed that the second phase particles that remain after etching and desmutting have a significant impact on the subsequent sol-gel coating which, in turn, influences the overall corrosion protection afforded to the substrate by the sol-gel coating. The removal of second phase particles in the surface region can be achieved by an alternative surface pretreatment using nitric acid. A significant improvement of corrosion protection of sol-gel coated AA2024 aluminium alloy was observed when the surface of the alloy was pretreated with nitric acid.
| Original language | English |
|---|---|
| Pages (from-to) | 1452-1456 |
| Number of pages | 5 |
| Journal | Surface and Interface Analysis |
| Volume | 45 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 2013 |
Keywords
- AA2024-T3 aluminium alloy
- acid cleaning
- alkaline etching
- sol-gel coatings