Abstract
Increasing environmental concern has led to the restrictive use of chromate conversion coatings to protect Al-alloys from corrosion. Our research is under way to find environmentally compliant substitute coating such as Si/Zr/Ce hybrid coating. The corrosion protection effect of green pretreatment reagent consisted of Si-containing base solution, Ce- and Zr-containing sealing solutions on the corrosion protection of Al-alloys was studied with a 3.5% NaCl aqueous testing solution. The correlation between the corrosion resistance measured by electrochemical impedance spectroscopy (EIS) and surface chemical composition of the hybrid coating measured by time-of-flight secondary ion mass spectroscopy (ToF-SIMS) was studied. The proposed green pretreatment reagent was found improve the corrosion protection of Al-alloys, presumably due to the formation of protective oxide film acting as an oxygen barrier.
| Original language | English |
|---|---|
| Pages (from-to) | 1531-1533 |
| Number of pages | 3 |
| Journal | Applied Surface Science |
| Volume | 255 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Dec 15 2008 |
Keywords
- Cerium
- Corrosion protection
- EIS
- Green aluminum
- Silicate
- ToF-SIMS
- Zirconium
ASJC Scopus subject areas
- General Chemistry
- Condensed Matter Physics
- Surfaces, Coatings and Films
- General Physics and Astronomy
- Surfaces and Interfaces
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