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| Corrosion Behavior of Charged Connectors in Wet and Heat Marine Environment |
| Received:September 30, 2017 Revised:February 15, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2018.02.020 |
| KeyWord:wet and heat marine environment connectors anaerobic copper test tablets corrosion behavior natural exposure test |
| Author | Institution |
| LYU Wang-yan |
Electric Power Research Institute, Electric Power Research Institute of Guangdong Power Grid Co. Ltd, Guangzhou , China |
| HUANG Jian-ye |
State Key Laboratory of Environmental Adaptability for Industrial Products, China National Electric Apparatus Research Institute Co., Ltd, Guangzhou , China |
| RUAN Hong-mei |
State Key Laboratory of Environmental Adaptability for Industrial Products, China National Electric Apparatus Research Institute Co., Ltd, Guangzhou , China |
| CHEN Chuan |
State Key Laboratory of Environmental Adaptability for Industrial Products, China National Electric Apparatus Research Institute Co., Ltd, Guangzhou , China |
| CHEN Tian-sheng |
Electric Power Research Institute, Electric Power Research Institute of Guangdong Power Grid Co. Ltd, Guangzhou , China |
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| Abstract: |
| Objective To research corrosion behavior of charged connectors in wet and heat marine environment to provide scientific evidence for the material selection, maintenance and replacement of connectors. Methods Temperature and humidity recorder and anaerobic copper test films were applied to monitor the corrosion environment of Sanya natural environment test station to analyze the law of change of environmental conditions. At the same time, the corrosion behaviors of the electrically charged and uncharged PCB patch and pin connector were researched by exposing test in wet and hot Marine natural environment. The corrosion behavior rule and the difference of connectors between the two working conditions were analyzed. Results From January to march, the humid and hot ocean atmosphere in Sanya was alternately wet and dry. The cycle was at least one cycle per day. The average humidity time each day was 6.0 h, 7.4 h and 11.6 h respectively. From January to march, the environmental causticity was GX level. In March, the corrosive environment was more severe than January and February. After three months of natural exposure in wet and heat marine environment, the corrosion behavior of the electrically charged and uncharged patch type data communication connector on the was basically similar, there is no obvious difference. The contact resistance did not change. The Insulation resistance was reduced to 107 Ω. There was no obvious corrosion occurred in metal components. After three months of natural exposure in wet and heat marine environment, the contact resistance of insert pin type terminal did not change. However, there were obvious differences in corrosion behavior. Under the uncharged conditions, the screws of insert pin type terminal were severely corroded. The insulation resistance of insert pin type terminal was reduced to 106 Ω orders of magnitude. However, there was no corrosion of screws under the charged working condition. The insulation resistance was maintained in 109 Ω orders of magnitude. Conclusion In the wet and hot ocean environment, there were differences in the effect of current on corrosion behavior of different connectors. For patch type data communication connectors, the corrosion behavior is almost not affected. However, it protects corrosion behavior of pin terminal to a certain extent. |
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