钢结构镀锌涂层冲蚀磨损表面形貌及粗糙度
发布时间：2019-08-17 15:25
【摘要】：我国西北地区风沙特殊环境对该地区钢结构的耐久性和安全性影响严重。利用风沙环境侵蚀实验系统、扫描电子显微镜(SEM)和激光共聚焦显微镜(LSCM)研究钢结构镀锌涂层受风沙冲蚀磨损损伤行为和损伤形貌,并分析其表面粗糙度。结果表明:涂层材料的冲蚀损伤行为更加依赖于冲蚀角度,在不同冲蚀角度下风沙流对涂层材料的冲蚀磨损过程同时存在类似表面划伤和挤压变形剥落;涂层材料的冲蚀坑深度随着冲蚀速度的增大而增加,在90°时冲蚀坑深度大于45°时的冲蚀坑深度;在相同的冲蚀速度下,45°时表面平均粗糙度Sa和均方差Sq较90°时大,在相同的冲蚀角度下,Sa和Sq均随速度的增大而增大。在冲蚀中后期,粒子对凹凸不平的表面冲蚀磨损破坏严重,试件表面峰谷的形成和破坏导致冲蚀率增加。
[Abstract]:The special environment of wind and sand in northwest China has a serious impact on the durability and safety of steel structures in this area. The damage behavior and morphology of galvanized coating on steel structure by wind sand erosion were studied by scanning electron microscope (SEM) and laser confocal microscope (LSCM), and the surface roughness of galvanized coating was analyzed by scanning electron microscope (SEM) and laser confocal microscope (LCSM). The results show that the erosion damage behavior of the coating material depends more on the erosion angle, and there are similar surface scratches and extrusion deformation and spalling in the erosion wear process of the coating material by wind sand flow at different erosion angles, and the erosion pit depth of the coating material increases with the increase of erosion velocity, and the erosion pit depth increases when the erosion pit depth is greater than 45 掳at 90 掳, and the erosion pit depth increases with the increase of erosion velocity, and the erosion pit depth increases with the increase of erosion velocity, and the erosion pit depth increases with the increase of erosion velocity. At the same erosion speed, the average surface roughness Sa and mean square error Sq at 45 掳are larger than those at 90 掳. At the same erosion angle, both Sa and Sq increase with the increase of velocity. In the middle and late stage of erosion, the erosion wear of uneven surface is seriously damaged, and the formation and failure of peak and valley on the surface of the specimen lead to the increase of erosion rate.
【作者单位】： 内蒙古工业大学土木工程学院;内蒙古工业大学内蒙古自治区土木工程结构与力学重点实验室;内蒙古工业大学理学院;
【基金】：国家自然科学基金(11162011,51468049,11662012)~~
【分类号】：TG174.44
[Abstract]:The special environment of wind and sand in northwest China has a serious impact on the durability and safety of steel structures in this area. The damage behavior and morphology of galvanized coating on steel structure by wind sand erosion were studied by scanning electron microscope (SEM) and laser confocal microscope (LSCM), and the surface roughness of galvanized coating was analyzed by scanning electron microscope (SEM) and laser confocal microscope (LCSM). The results show that the erosion damage behavior of the coating material depends more on the erosion angle, and there are similar surface scratches and extrusion deformation and spalling in the erosion wear process of the coating material by wind sand flow at different erosion angles, and the erosion pit depth of the coating material increases with the increase of erosion velocity, and the erosion pit depth increases when the erosion pit depth is greater than 45 掳at 90 掳, and the erosion pit depth increases with the increase of erosion velocity, and the erosion pit depth increases with the increase of erosion velocity, and the erosion pit depth increases with the increase of erosion velocity. At the same erosion speed, the average surface roughness Sa and mean square error Sq at 45 掳are larger than those at 90 掳. At the same erosion angle, both Sa and Sq increase with the increase of velocity. In the middle and late stage of erosion, the erosion wear of uneven surface is seriously damaged, and the formation and failure of peak and valley on the surface of the specimen lead to the increase of erosion rate.
【作者单位】： 内蒙古工业大学土木工程学院;内蒙古工业大学内蒙古自治区土木工程结构与力学重点实验室;内蒙古工业大学理学院;
【基金】：国家自然科学基金(11162011,51468049,11662012)~~
【分类号】：TG174.44
【参考文献】
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