Abstract
Water diffusion in a composite coating on 2024 Al alloy was experimentally studied using electrochemical impedance spectroscopy (EIS). The composite coating contained an inner silane film and an outer silicone-epoxy layer. The measured value of water diffusion coefficient of the composite coating by the EIS method was compared to the value predicted using a mathematical model. The results indicated the non-continuity of water concentration at the interface of silane film and silicone-epoxy layer. Considering water concentration jump on the silane film/silicone-epoxy boundary, the diffusion coefficient of the composite coating obtained by validation model was similar to that obtained from the experimental method.
| Original language | English |
|---|---|
| Pages (from-to) | 787-791 |
| Number of pages | 5 |
| Journal | Journal of Coatings Technology and Research |
| Volume | 12 |
| Issue number | 4 |
| DOIs | |
| State | Published - 1 Jul 2015 |
Keywords
- Corrosion protection
- EIS
- Silane film
- Silane film
- Water concentration jump