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| IR Analysis of Corrosion Products on Aluminum Alloy in Simulate Island Environments |
| Received:April 20, 2015 Revised:August 15, 2015 |
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| DOI：10.7643/issn.1672-9242.2015.04.024 |
| KeyWord:aluminum alloy corrosion island environment infrared spectroscopy |
| Author | Institution |
| LIU Jin-jun |
Nanjing Military Representative Bureau of PLA， Nanjing ， China |
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| Abstract: |
| Objective To study the corrosion behavior of aluminum alloy of ammunition metal materials in the environment with high temperature and high salt fog condition. Methods The corrosion process of aluminum alloy was investigated on the simulate island environment with high temperature and high salt fog condition. The corrosion products were characterized by fourier transform infrared spectroscopy (FT-IR), and a preliminary discussion of the corrosion mechanism was made. Results Aluminum alloy exposed to damp air may easily adsorb a thin layer of liquid, and the electrochemical reaction occurs in the liquid layer. Al(OH)3 was generated on the surface of aluminum alloy, then a more stable Al2O3 was formed after slow dehydration of Al(OH)3. Conclusion When the aluminum alloy surface was deposed with salt, numerous microbatteries will form due to the strong erosion of Cl- and the deliquescence of NaCl, which eventually led to the rupture of Al2O3 protective membrane. Moreover, the corrosive medium then will be in contact with the substrate, which may progressively extension of corrosion and accelerate the corrosion of substrate. |
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