【摘要】：我國(guó)西北地區(qū)風(fēng)沙特殊環(huán)境對(duì)該地區(qū)鋼結(jié)構(gòu)的耐久性和安全性影響嚴(yán)重。利用風(fēng)沙環(huán)境侵蝕實(shí)驗(yàn)系統(tǒng)、掃描電子顯微鏡(SEM)和激光共聚焦顯微鏡(LSCM)研究鋼結(jié)構(gòu)鍍鋅涂層受風(fēng)沙沖蝕磨損損傷行為和損傷形貌,并分析其表面粗糙度。結(jié)果表明:涂層材料的沖蝕損傷行為更加依賴于沖蝕角度,在不同沖蝕角度下風(fēng)沙流對(duì)涂層材料的沖蝕磨損過程同時(shí)存在類似表面劃傷和擠壓變形剝落;涂層材料的沖蝕坑深度隨著沖蝕速度的增大而增加,在90°時(shí)沖蝕坑深度大于45°時(shí)的沖蝕坑深度;在相同的沖蝕速度下,45°時(shí)表面平均粗糙度Sa和均方差Sq較90°時(shí)大,在相同的沖蝕角度下,Sa和Sq均隨速度的增大而增大。在沖蝕中后期,粒子對(duì)凹凸不平的表面沖蝕磨損破壞嚴(yán)重,試件表面峰谷的形成和破壞導(dǎo)致沖蝕率增加。
[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 擄at 90 擄, 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 擄are larger than those at 90 擄. 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.
【作者單位】： 內(nèi)蒙古工業(yè)大學(xué)土木工程學(xué)院;內(nèi)蒙古工業(yè)大學(xué)內(nèi)蒙古自治區(qū)土木工程結(jié)構(gòu)與力學(xué)重點(diǎn)實(shí)驗(yàn)室;內(nèi)蒙古工業(yè)大學(xué)理學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(11162011,51468049,11662012)~~
【分類號(hào)】：TG174.44

【參考文獻(xiàn)】

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本文編號(hào)：2527873