Abstract
We have studied the adsorption of polyphosphonates synthesized from polyamines (dendrimers, hyperbranched polymers, linear polymers) and monomeric hydrophobic phosphonates on the native aluminum oxide on the surface of the aluminum alloy AA2024-T3. FTIR measurements showed that this adsorption is effective and highly improved by the coordination of the multifunctional phosphonates with zirconium ions. SEM images of the alloys after the adsorption experiments indicated that significant surface corrosion occurred for the polyphosphonate/zirconium treatment, but no sign of corrosion was found after the monomeric hydrophobic phosphonate treatment. Potentiostatic measurements of O2 reduction in a wall-jet flow cell showed that the polyphosphonates highly activated the alloy surface toward dioxygen reduction, whereas the monomeric hydrophobic phosphonate actually inhibited this reaction.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings - Electrochemical Society |
| Editors | V.I. Birss, L.D. Burke, A.R. Hillman, R.S. Lillard |
| Pages | 241-250 |
| Number of pages | 10 |
| Volume | 25 |
| State | Published - 2003 |
| Externally published | Yes |
| Event | Surface Oxide Films - Proceedings of the International Symposium - Orlando, FL., United States Duration: Oct 12 2003 → Oct 17 2003 |
Other
| Other | Surface Oxide Films - Proceedings of the International Symposium |
|---|---|
| Country/Territory | United States |
| City | Orlando, FL. |
| Period | 10/12/03 → 10/17/03 |
ASJC Scopus subject areas
- Engineering(all)