In this study, the paint layer was removed on the surface of 5083 aluminum alloy using laser cleaning and mechanical grinding. The microstructure and performance of experimental samples were carefully investigated using scanning electron microscope, energy disperse spectroscopy and other methodologies. The results showed that compared with mechanical grinding, laser cleaning can improve the surface paint coating of aluminum alloy more effectively. The surface of the matrix formed uniformly distributed volcanic craters and small holes emerged at the spot junction after laser cleaning. The carbon and oxygen content on the substrate surface after laser cleaning was much lower than that after mechanical grinding. In addition, the corrosion resistance and coating adhesion of the substrate were obviously improved using laser cleaning. It was closely associated with refinement of the grains and reduction in surface roughness. We concluded that laser cleaning can be widely used to replace mechanical grinding in manufacturing on the premise of meeting industrial needs.

本研究采用激光清洗和​​机械研磨去除5083铝合金表面的漆层。使用扫描电子显微镜、能量色散光谱和其他方法仔细研究了实验样品的微观结构和性能。结果表明，与机械研磨相比，激光清洗能更有效地改善铝合金表面油漆涂层。基体表面形成均匀分布的火山口，激光清洗后在点结处出现小孔。激光清洗后基板表面的碳和氧含量远低于机械研磨后的碳和氧含量。此外，使用激光清洗可以明显提高基材的耐腐蚀性和涂层附着力。它与晶粒的细化和表面粗糙度的降低密切相关。我们得出结论，在满足工业需求的前提下，激光清洗可以广泛用于替代制造中的机械研磨。