Abstract
X-Ray absorption spectra of chromate conversion coatings on Al 2024-T3 and 3003-H14 have been obtained as a function of processing time and environmental exposure. The spectra reveal the presence of a significant ratio of unreacted hexavalent chromium in the chromate conversion coatings which decays with the time of exposure in air-equilibrated 0.5 M NaCl. These results suggest that the unique corrosion-protective property of chromated Al lies in the presence of a source of the hexavalent chromium species as an active inhibiting species.
| Original language | English |
|---|---|
| Pages (from-to) | 41-49 |
| Number of pages | 9 |
| Journal | Corrosion Science |
| Volume | 34 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1993 |
ASJC Scopus subject areas
- General Materials Science
- Metals and Alloys
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