| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1656961 | Surface and Coatings Technology | 2015 | 10 Pages |
•The formation of boehmite film on aluminium alloy surface•Boehmite enhanced the corrosion resistance properties of the metal substrate.•The pitting potential was a function of the vapour pressure of the steam.•Filiform and acid salt spray performance was related to steam vapour pressure.
The steam treatment of aluminium alloys with varying vapour pressure of steam resulted in the growth of aluminium oxyhydroxide films of thickness range between 450 and 825 nm. The surface composition, corrosion resistance, and adhesion of the produced films were characterised by XPS, potentiodynamic polarisation, acetic acid salt spray, filiform corrosion test, and tape test. The oxide films formed by steam treatment showed good corrosion resistance in NaCl solution by significantly reducing anodic and cathodic activities. The pitting potential of the surface treated with steam was a function of the vapour pressure of the steam. The accelerated corrosion and adhesion tests on steam generated oxide films with commercial powder coating verified that the performance of the oxide coating is highly dependent on the vapour pressure of the steam.
