| 孙有美,杨华明,李景育,王玲,李念林,张宸.Ni18Co9Mo5在湿热海洋和亚湿热酸雨大气环境下的性能变化规律研究[J].装备环境工程,2023,20(8):152-159. SUN You-mei,YANG Hua-ming,LI Jing-yu,WANG Ling,LI Nian-lin,ZHANG Chen.Changes in Properties of Ni18Co9Mo5 in Humid and Hot Marine Atmosphere and Sub-humid and Hot Acid Rain Atmosphere[J].Equipment Environmental Engineering,2023,20(8):152-159. |
| Ni18Co9Mo5在湿热海洋和亚湿热酸雨大气环境下的性能变化规律研究 |
| Changes in Properties of Ni18Co9Mo5 in Humid and Hot Marine Atmosphere and Sub-humid and Hot Acid Rain Atmosphere |
| 投稿时间：2022-12-15 修订日期：2023-03-13 |
| DOI：10.7643/issn.1672-9242.2023.08.020 |
| 中文关键词: Ni18Co9Mo5 湿热海洋大气环境 亚湿热酸雨大气环境 大气腐蚀 力学性能中图分类号:TG172.3 文献标识码:A 文章编号:1672-9242(2023)08-0152-08 |
| 英文关键词:Ni18Co9Mo5 humid and hot marine atmosphere sub-humid and hot acid rain atmosphere atmospheric corrosion mechanical property |
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| Author | Institution |
| SUN You-mei | Southwest Institute of Technology and Engineering, Chongqing 400039, China;Hainan Wanning National Field Scientific Observation Research Station for Material Corrosion in Atmospheric Environment,HainanWanning 571522, China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing 400039, China;Chongqing Key Laboratory of Environmental Effect and Protection, Chongqing 400039, China |
| YANG Hua-ming | Southwest Institute of Technology and Engineering, Chongqing 400039, China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing 400039, China |
| LI Jing-yu | Southwest Institute of Technology and Engineering, Chongqing 400039, China;Hainan Wanning National Field Scientific Observation Research Station for Material Corrosion in Atmospheric Environment,HainanWanning 571522, China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing 400039, China |
| WANG Ling | Southwest Institute of Technology and Engineering, Chongqing 400039, China;Hainan Wanning National Field Scientific Observation Research Station for Material Corrosion in Atmospheric Environment,HainanWanning 571522, China;Chongqing Key Laboratory of Environmental Effect and Protection, Chongqing 400039, China |
| LI Nian-lin | Southwest Institute of Technology and Engineering, Chongqing 400039, China;Hainan Wanning National Field Scientific Observation Research Station for Material Corrosion in Atmospheric Environment,HainanWanning 571522, China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing 400039, China |
| ZHANG Chen | Southwest Institute of Technology and Engineering, Chongqing 400039, China;Hainan Wanning National Field Scientific Observation Research Station for Material Corrosion in Atmospheric Environment,HainanWanning 571522, China;CSGC Key Laboratory of Ammunition Storage Environmental Effects, Chongqing 400039, China |
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| 中文摘要: |
| 目的 研究Ni18Co9Mo5在湿热海洋环境(永兴)和亚湿热酸雨环境(重庆)下的腐蚀行为和力学性能规律。方法 通过金属粉末注塑成形方法制备Ni18Co9Mo5样品，采用力学试验机、X射线衍射分析仪、扫描电子显微镜、能谱分析仪、金相显微镜对Ni18Co9Mo5在永兴和重庆典型大气环境下暴露试验18个月的性能变化规律进行研究。结果 Ni18Co9Mo5样品的耐蚀性较差，在海洋环境和亚湿热酸雨下暴露2个月即出现明显的腐蚀现象，在平均相对湿度达到临界湿度(80%)基础上，腐蚀介质SO2(亚湿热酸雨环境)和Cl–(海洋环境)对Ni18Co9Mo5金属材料的早期腐蚀具有加剧作用。Ni18Co9Mo5在永兴试验18个月后，腐蚀产物较为疏松，且样品内外腐蚀区域均存在明显裂纹，其抗拉强度和冲击能量分别下降43%和60%左右；在重庆试验18个月后，其抗拉强度下降15%，冲击能量整体变化不明显。湿热海洋环境中侵蚀性强的Cl–导致Ni18Co9Mo5发生点蚀，甚至裂纹萌生及扩展，加剧了样品基体的腐蚀，有效承载面积减小及裂纹导致力学性能明显下降。结论 Ni18Co9Mo5在湿热海洋环境下的腐蚀程度和力学性能下降比亚湿热酸雨环境更为严重。 |
| 英文摘要: |
| The work aims to study the corrosion behaviors and mechanical properties of Ni18Co9Mo5 in humid and hot marine atmosphere (Yongxing) and sub-humid and hot acid rain atmosphere (Chongqing). The Ni18Co9Mo5 was prepared by metal powder injection molding and exposed intypical atmospheric environment of Yongxing and Chongqing for 18 months. Then, the changes in properties of Ni18Co9Mo5 were studied by mechanical test machine, X-ray diffraction analysis, scanning electron microscope, energy spectrum analyzer and metallurgical microscope. The corrosion resistance of Ni18Co9Mo5 was poor, and the obvious corrosion appeared after 2 months of exposure in marine atmosphereand sub-humid and hot acid rain atmosphere. On the basis that the average relative humidity reached the critical humidity (80%), the corrosive media SO2 (sub-humid and hot acid rain atmosphere) and Cl– (marine atmosphere) intensified the early corrosion of Ni18Co9Mo5 metal materials.The corrosion products of Ni18Co9Mo5 after 18 months of exposure in Yongxing were loose and there were obvious cracks in the corrosion area and the tensile strength and impact energy decreased by about 43% and 60%.However, the tensile strength of Ni18Co9Mo5 after 18 months of exposure in Chongqing decreased by 15% and the impact energy was basically unchanged. The highly aggressive Cl- resulted in the pitting corrosion and the initiation and expansion of cracks in the humid and hot marine atmosphere, which accelerated the corrosion of Ni18Co9Mo5 matrix, reduced the effective bearing area and resulted in the decrease of mechanical properties. The corrosion degree and decrease of mechanical properties of Ni18Co9Mo5 in humid and hot marine atmosphere are more serious than those in sub-humid and hot acid rain atmosphere. |
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