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| Effect of Marine Environment on Corrosion Behavior of Helicopter Foundation Products |
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| DOI：10.7643/issn.1672-9242.2023.05.004 |
| KeyWord:helicopter basic products bolt, clamp marine environment corrosion |
| Author | Institution |
| CUI Teng-fei |
Standard and Material Department, China Helicopter Research and Development Institute, Jiangxi Jingdezhen , China |
| GAO Meng |
Key Laboratory of Advanced Corrosion and Protection Aviation Materials, Beijing Institute of Aeronautical Material, Beijing , China |
| HU Jian-qing |
Standard and Material Department, China Helicopter Research and Development Institute, Jiangxi Jingdezhen , China |
| LIU Chong |
Standard and Material Department, China Helicopter Research and Development Institute, Jiangxi Jingdezhen , China |
| SONG Jian |
Key Laboratory of Advanced Corrosion and Protection Aviation Materials, Beijing Institute of Aeronautical Material, Beijing , China |
| LIU Ming |
Key Laboratory of Advanced Corrosion and Protection Aviation Materials, Beijing Institute of Aeronautical Material, Beijing , China |
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| Abstract: |
| The work aims to study the corrosion and mechanical properties of helicopter foundation products such as bolts and clamps under marine and atmospheric environment and verify the protective effect of the helicopter protection system on the basic products through structural simulation connectors. By test of the bolts, clamps and connectors in the outfield for different exposing time, the surface state and mechanical properties of the test pieces were regularly tested during this period to analyze the effect of the marine environment on the poor foundation of the helicopter and the reliability of the on-board protection methods. The results showed that:after 2 years of corrosion, obvious corrosion occurred to the bolt surface, but the corrosion depth was not large, the tensile strength remained at 18.3 MPa, and the shear strength decreased from 27.99 MPa to 26.52 MPa. The clamp was corroded, and the rubber material was seriously aged. The pushing force of clamp was reduced by 80%, and the locking performance was basically lost. For the typical connector with coating protection, the surface thickness was 66 mm, the color difference was 0.3, and the gloss changed by 1%. The parameters had little change compared with the unexposed ones. Therefore, in the marine atmospheric environment, bolts and clamps are not recommended to be used when protective measures are taken. The protective measures adopted on the helicopter are effective and can play a good role in protecting the substrate. |
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