Abstract
The effect of ammonium adipate on the sulphuric acid anodizing of 7075-T6 aluminum alloy was studied. The surface morphologies of anodic oxide films formed in the sulphuric acid solutions with and without ammonium adipate were studied by using field emission scanning electron microscopy (FE-SEM). The anodizing behavior of 7075-T6 aluminum alloy was investigated under linear polarization conditions in sulphuric acid anodizing solutions with and without of ammonium adipate. The potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were used to study the corrosion resistance of the anodic oxide films formed in the presence and absence of ammonium adipate. The results show that the ammonium adipate in sulfuric acid solution can reduce the cavity defects of the films, decrease the pores diameter, reduce the corrosion current density, enhance the thickness of the barrier layer and improve the corrosion resistance of anodic oxide films by decreasing the current density.
| Original language | English |
|---|---|
| Pages (from-to) | 324-330 |
| Number of pages | 7 |
| Journal | Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals |
| Volume | 22 |
| Issue number | 1 |
| State | Published - Jan 2012 |
Keywords
- 7075-T6 aluminum alloy
- Ammonium adipate
- Anodizing
- Electrochemical impedance spectrascopy
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