Abstract
A top ceramic coating was fabricated on the surface mechanical attrition treatment (SMAT) modified nanocrystalline layer of 2024 Al alloy by microarc oxidation (MAO) process. The corrosion resistance of the SMAT-MAO composite coating was studied by EIS. The results show that SMAT-MAO composite coating with 10 μm top ceramic coating exhibited better corrosion resistance, while the SMAT-MAO coating with the thickness of 15 μm showed worse corrosion resistance compared with those simple MAO coatings with same thickness. The formation of a dense passive film at the damaged region caused by the bottom nanocrystalline interface contributed to the improved corrosion resistance property.
| Original language | English |
|---|---|
| Pages (from-to) | 473-480 |
| Number of pages | 8 |
| Journal | Corrosion Science |
| Volume | 53 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2011 |
Keywords
- A. Aluminium
- B. EIS
- C. Anodic films
- C. Passive films
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