Abstract
The adhesion and bonding performance of waterborne polyurethane (PU) coating on aluminum alloy surface was improved in this study. To achieve this objective, the effects of different sodium silicate concentrations on the aluminum alloy micro-arc oxidation (MAO) layer and the adhesion strength and corrosion resistance ofMAO-PUcomposite coating before and after modification by MAO treatment of the 7050 aluminum alloy were studied. The experimental results showed that the modification of the MAO membrane layer by a silane coupling agent could significantly improve the adhesion strength and corrosion resistance of the composite coating. Moreover, the maximum adhesion strength was obtained when the concentration of sodium silicate was 12 g L-1.
| Original language | English |
|---|---|
| Article number | 6787 |
| Journal | Applied Sciences (Switzerland) |
| Volume | 10 |
| Issue number | 19 |
| DOIs | |
| State | Published - 1 Oct 2020 |
| Externally published | Yes |
Keywords
- Adhesion strength
- Corrosion resistance
- Micro-arc oxidation
- Polyurethane coating
- Silane coupling agent
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