Abstract The aim of this paper is to investigate the effect of variant sandblasting parameters such as pressure, angle and sand granulometry on galvanized steel surface chemical composition, roughness and free energy for the purpose of increasing its adhesion properties for further use in structural bonding applications. Two sandblasting pressures (5 × 10 5 Pa, 6 × 10 5 Pa), two sandblasting angles (75°, 90°), and three glace sand granulometries (200/300, 90/150, 70/110) were tested. Surface chemical composition was evaluated using a scanning electron microscope, surface roughness was measured using a mechanical surfscan and surface free energy was determined using the contact angle method along with the two component Owens-Wendt model. Trials revealed that the sandblasting method has an effect on the surface free energy, wettability, chemical composition and roughness. As the sandblasting pressure and glace sand granulometry increased, the surface average roughness (Ra) increased. Specimens treated with the lowest glace sand granulometry had the highest surface free energy ( γ s t ). Glace sand granulometry had a more significant effect on the galvanized steel surface properties than that of the sandblasting pressure and angle. Sandblasting angle variation affected the surface chemical composition and wettability rather than the roughness. Sand residue presented at the level of the treated surface varied according to the sandblasting setting which might have affected the surface free energy and wettability along with the roughness.

中文翻译：

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喷砂参数变化对镀锌钢表面化学成分、粗糙度和自由能的影响

摘要 本文的目的是研究不同喷砂参数（如压力、角度和砂粒测定）对镀锌钢表面化学成分、粗糙度和自由能的影响，以提高其粘合性能，以进一步用于结构粘合应用。测试了两种喷砂压力（5 × 10 5 Pa、6 × 10 5 Pa）、两种喷砂角度（75°、90°）和三种磨砂粒度（200/300、90/150、70/110）。使用扫描电子显微镜评估表面化学成分，使用机械表面扫描测量表面粗糙度，使用接触角法以及双组分 Owens-Wendt 模型确定表面自由能。试验表明，喷砂方法对表面自由能、润湿性、化学成分和粗糙度。随着喷砂压力和冰砂粒度的增加，表面平均粗糙度（Ra）增加。用最低的冰砂粒度处理的样品具有最高的表面自由能 ( γ st )。与喷砂压力和角度相比，釉砂粒度对镀锌钢表面性能的影响更显着。喷砂角度变化影响表面化学成分和润湿性，而不是粗糙度。在处理过的表面水平上出现的砂渣根据喷砂设置而变化，这可能会影响表面自由能和润湿性以及粗糙度。用最低的冰砂粒度处理的样品具有最高的表面自由能 ( γ st )。与喷砂压力和角度相比，釉砂粒度对镀锌钢表面性能的影响更显着。喷砂角度变化影响表面化学成分和润湿性，而不是粗糙度。在处理过的表面水平上出现的砂渣根据喷砂设置而变化，这可能会影响表面自由能和润湿性以及粗糙度。用最低的冰砂粒度处理的样品具有最高的表面自由能 ( γ st )。与喷砂压力和角度相比，釉砂粒度对镀锌钢表面性能的影响更显着。喷砂角度变化影响表面化学成分和润湿性，而不是粗糙度。在处理过的表面水平上出现的砂渣根据喷砂设置而变化，这可能会影响表面自由能和润湿性以及粗糙度。喷砂角度变化影响表面化学成分和润湿性，而不是粗糙度。在处理过的表面水平上出现的砂渣根据喷砂设置而变化，这可能会影响表面自由能和润湿性以及粗糙度。喷砂角度变化影响表面化学成分和润湿性，而不是粗糙度。在处理过的表面水平上出现的砂渣根据喷砂设置而变化，这可能会影响表面自由能和润湿性以及粗糙度。