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| Corrosion Morphology and Contact Resistance of Microswitch in Different Environments |
| Received:October 22, 2018 Revised:April 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.04.016 |
| KeyWord:microswitch acidic salt spray corrosion contact resistance |
| Author | Institution |
| ZHU Meng |
AVIC China Aero-Polytechnology Establishment, Beijing , China |
| LI Ming |
AVIC China Aero-Polytechnology Establishment, Beijing , China |
| LI Gang |
AVIC China Aero-Polytechnology Establishment, Beijing , China |
| FU Yun |
AVIC China Aero-Polytechnology Establishment, Beijing , China |
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| Abstract: |
| Objective To compare and analyze corrosion behaviors of microswitch under different test conditions and study on its corrosion mechanism. Methods In this paper, contact resistance as well as external and internal structure corrosion situations of microswitch under alternate environment with wetting and drying acidic salt spray, composite test environment of salt spray/SO2 and atmosphere environment of tropical ocean were observed and analyzed with energy spectrum. Moreover, corrosion mechanisms and their effect on electrical property parameters under different environment were analyzed and discussed. Results The environment with sulphur affected silver contactors in microswitch the most. Conclusion The product of this process is silver sulfide which has extremely poor electrical conductivity. As a result, contact resistance of the microswitch becomes stronger. |
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