Droździel-Jurkiewicz Magda, Bieniaś Jarosław
Department of Materials Engineering, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland.
Materials (Basel). 2022 Sep 3;15(17):6118. doi: 10.3390/ma15176118.
The paper presents the issues of metal surface treatment in fibre metal laminates (FML) to obtain high adhesion at the metal-composite interface. Aluminium 2024-T3 and titanium Grade 2 were analysed. The metal surface modifications were carried out by mechanical (sandblasting, Scotch-Brite abrasion), chemical (P2 etching, phosphate-fluoride process), electrochemical (chromic and sulphuric acid anodizing), and plasma treatment, as well as the application of sol-gel coatings. In terms of surface geometry, the analysis included roughness and 3D surface topography examination. The morphology was examined using scanning electron and atomic force microscopy. The surface free energy and its components (polar and dispersive) were determined using the Owens-Wendt method. The novelty of this study is the determination of the effect of different surface treatments on the surface free energy, topography, and morphology in terms of the possible appropriate adhesion in fibre metal laminates. Chromic acid anodizing is still the most effective in enhancing the expected adhesion. A suitable technique may be the use of P2 etching of aluminium. It results in low roughness, numerous micro-irregularities, and the presence of porosity. The obtained test results show that the application of sol-gel coating increases the surface free energy and may increase the adhesion.
本文介绍了纤维金属层压板（FML）中金属表面处理的问题，以在金属-复合材料界面获得高附着力。对2024-T3铝合金和2级钛进行了分析。金属表面改性通过机械（喷砂、百洁布打磨）、化学（P2蚀刻、磷酸盐-氟化物处理）、电化学（铬酸和硫酸阳极氧化）、等离子体处理以及溶胶-凝胶涂层的应用来进行。在表面几何形状方面，分析包括粗糙度和3D表面形貌检查。使用扫描电子显微镜和原子力显微镜检查形态。使用欧文斯-温德特方法测定表面自由能及其组分（极性和分散性）。本研究的新颖之处在于，就纤维金属层压板中可能的适当附着力而言，确定了不同表面处理对表面自由能、形貌和形态的影响。铬酸阳极氧化在增强预期附着力方面仍然是最有效的。一种合适的技术可能是对铝进行P2蚀刻。它会产生低粗糙度、大量微不规则性和孔隙率。获得的测试结果表明，溶胶-凝胶涂层的应用增加了表面自由能，并可能增加附着力。
