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| Study on Corrosion Damage Probability Distribution Law of Aluminum-Lithium Alloy Based on Accelerated Corrosion Test |
| Received:October 14, 2010 Revised:June 15, 2011 |
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| DOI： |
| KeyWord:1420 aluminum-lithium alloy EXCO solution corrosion depth probability distribution kinetics law |
| Author | Institution |
| LIU Zhi-guo |
Naval Aeronautical Engineering Academy Qingdao Branch， Qingdao ， China |
| YE Bin |
Institute 650 of Hongdu Aviation Industry Group， Nanchang ， China |
| MU Zhi-tao |
Naval Aeronautical Engineering Academy Qingdao Branch， Qingdao ， China |
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| Abstract: |
| Immersion corrosion test of 1420 aluminum- lithium alloy was carried out in EXCO solution; corrosion depth data was obtained; statistical study of corrosion depth was carried out based on the data. The results showed that the corrosion depth obeys Gumbel distribution, Normal distribution, Weibull distribution and Log-Normal distribution. The kinetics laws of corrosion were established according to the corrosion depths data. The kinetics laws showed that the corrosion behavior can be divided into two stages. In the earlier stage, corrosion rate is slower, in the later stage, corrosion rate is faster. During the two stages the kinetics law of 1420 aluminum-lithium alloy corrosion behavior in EXCO solution approximately follows a linear law. |
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