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| Accelerated Corrosion Test and Result Analysis of Extracurricular Equipment Box in Simulated Marine Atmospheric Environment |
| Received:October 17, 2023 Revised:November 27, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2024.01.013 |
| KeyWord:cabin equipment box simulating marine atmospheric environment corrosion damage acceleration |
| Author | Institution |
| ZHU Yuqin |
Southwest Institute of Technology and Engineering, Chongqing , China;Chongqing Key Laboratory for Environmental Effect and Protection, Chongqing , China |
| LI Jiameng |
Southwest Institute of Technology and Engineering, Chongqing , China;Chongqing Key Laboratory for Environmental Effect and Protection, Chongqing , China |
| DAI Lu |
Southwest Institute of Technology and Engineering, Chongqing , China;Chongqing Key Laboratory for Environmental Effect and Protection, Chongqing , China |
| WANG Wan |
Southwest Institute of Technology and Engineering, Chongqing , China;Chongqing Key Laboratory for Environmental Effect and Protection, Chongqing , China |
| ZHANG Wei |
Southwest Institute of Technology and Engineering, Chongqing , China |
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| Abstract: |
| The work aims to investigate the impact of simulated marine atmospheric environment on the corrosion behavior of extravehicular equipment cabin, in order to provide technical and methodological support for quickly evaluating the improvement of raw materials, structures, and surface technical conditions of extravehicular equipment cabin. Based on the actual service environment profile and corrosion damage status of the equipment box outside the XX cabin, a laboratory simulated marine atmospheric environment acceleration spectrum was developed with three modules:seawater simulation, humid heat, maintenance and inspection stage. Characterization techniques such as appearance, scanning electron microscopy (SEM), metallographic microscopy, and X-ray energy dispersive spectroscopy (EDS) were used to study the macroscopic and microscopic morphology of the equipment box and the distribution of corrosion product element content over 12 cycle periods, and compare the corrosion effects of standard metal aluminum and steel through synchronous laboratory tests and outdoor natural environments near XX offshore. After 12 cycles, the aluminum alloy on the base was severely corroded, presenting obvious intergranular corrosion and producing a large amount of corrosion products composed of O, Na, Al, Si, Cl, Ca, Mn, and Fe elements, and their corrosion appearance and degree were similar to the base after 5 years of service. After 120 days of cyclic testing, the corrosion effects of standard metal aluminum and steel were equivalent to those of 4.65 and 10.57 years of XX offshore atmospheric test. In the laboratory simulated marine atmospheric environment cycling test of three modules, namely seawater simulation, humidity and heat, maintenance and inspection, the corrosion degree of the equipment box outside the cabin is similar to that in the actual service environment, achieving a short-term completion of 3-5 years of marine operation verification. |
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