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| Estimate Method for Calendar Life of Helicopter′s Coating Based on Electrochemical Impedance |
| Received:April 26, 2017 Revised:July 15, 2017 |
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| DOI：10.7643/ issn.1672-9242.2017.07.016 |
| KeyWord:coating calendar life helicopter performance degradation |
| Author | Institution |
| LI Jian |
Army Aviation Research Institute, Beijing , China |
| WU Yun-zhang |
Army Aviation Research Institute, Beijing , China |
| LI Bo-shu |
Army Aviation Equipment Import Office, Beijing , China |
| GAO Yan-da |
Army Aviation Research Institute, Beijing , China |
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| Abstract: |
| Objective To study the estimate method for calendar life of helicoper’s coating during application. Methods The main factors affecting calendar life of helicopter’s coating were analyzed. The reasons for dispersibility and difference of the coating were given. The key estimate technology was determined. The assessment on the calendar life of a plateau helicoper’s coating was taken as an example to carry out 8 cycles of accelerated testing to select electrochemical impedance modulus (|Z|f=0.1 Hz) to describe the performance degradation process of the coating. Results Electrochemical impedance modulus and accelerating cycles met the function relationship Conclusions Stress fatigue affects the performance degradation of coating. Under the combined action of the environmental factors and higher local stress, the performance degradation of coating is obvious. This coating’s performance does not satisfy the 6 years of calendar life in the Plateau’s Parking Environment. |
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