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| Microstructure Influencing Factors of Aero Aluminum Alloy Pitting Corrosion Behavior |
| Received:October 27, 2016 Revised:March 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.03.005 |
| KeyWord:aero aluminum alloy pitting corrosion influencing factors microstructure |
| Author | Institution |
| LIU Zhi-guo |
Naval Aeronautical Engineering Academy Qingdao Branch, Qingdao , China |
| LI Xu-dong |
Naval Aeronautical Engineering Academy Qingdao Branch, Qingdao , China |
| MU Zhi-tao |
Naval Aeronautical Engineering Academy Qingdao Branch, Qingdao , China |
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| Abstract: |
| Objective To offer theory support for deeply understanding the pitting corrosion behavior of aluminum alloy and ascertaining the microstructure factors that affect the pitting corrosion behavior of aluminum alloy. Methods Pitting corrosion of aluminum alloy in the service environment was viewed as a stochastic process which is affected by many factors. Based on the electrochemical corrosion mechanism and constant volume evolution model, qualitative and statistic analyses on microstructure influencing factors of aluminum alloy pitting corrosion were carried out. Results Factors influencing the microstructure of aluminium alloy pitting corrosion included the size of constituent particles, the particle density and the type of the constituent particles. Conclusion Both the size and the density of microscopic particle of aluminum alloy are statistical. Distribution functions related might be adopted to have statistic analysis on its distribution characters. Cu and Fe particles have greater impact on the behavior of aluminum alloy pitting corrosion. |
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