Abstract
Cerium conversion coatings, formed on alumina borate whisker-reinforced aluminum composite with pre-treatment for different time, were characterized by SEM/EDX, TEM and electrochemical method. The structure and formation mechanism of the coatings were investigated in detail. It was found that the pre-treatment prior to coatings has strong influence on formation, growth and morphology as well as granular size of coatings. Two typical coating morphologies existed at the pre-treated substrate surfaces. Cracks only presented on thick coatings because of the higher deposition rate and the greater inner stress. Cracks preferably produced at the whisker/matrix interface and the grain boundary of matrix.
| Original language | English |
|---|---|
| Pages (from-to) | 3185-3192 |
| Number of pages | 8 |
| Journal | Corrosion Science |
| Volume | 50 |
| Issue number | 11 |
| DOIs | |
| State | Published - Nov 2008 |
| Externally published | Yes |
Keywords
- A. Metal matrix composite
- B. SEM
- B. TEM
- C. Passive film
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