The sol-gel synthesis process is a versatile method used to produce a wide diversity of materials and is being increasingly used as a surface modification method to alter porosity, wettability, catalytic activity, biocompatibility and corrosion performance of underlying substrates. Silane sol–gel films deposited on aluminium and aluminium alloys have been widely studied as chemical conversion coatings and as coupling agent between the substrate and organic layers. This study set out to investigate the effect of the surface chemical treatment prior to sol-gel application on the interfacial adhesion properties of a hybrid sol-gel film. Different surface pre-treatments, including two abrasive treatments and three chemical surface pre-treatments were used and their effect on surface chemistry and surface roughness was assessed. Surfaces were characterized by scanning electron microscopy, x-ray photoelectron spectroscopy, roughness measurements and static contact angles. Cerium nitrate loaded hybrid sol-gel films were deposited and adhesion on commercially pure aluminium was evaluated using pull-off testing. Statistical analysis revealed that, although highest adhesion values were obtained on rougher surfaces, the strongest correlation exist between the surface hydroxyl fraction and adhesion strength.

溶胶-凝胶合成工艺是一种通用方法，可用于生产多种材料，并且越来越多地用作表面改性方法来改变底层基材的孔隙率、润湿性、催化活性、生物相容性和腐蚀性能。沉积在铝和铝合金上的硅烷溶胶-凝胶薄膜已被广泛研究作为化学转化涂层和基材与有机层之间的偶联剂。本研究旨在研究在溶胶-凝胶应用之​​前的表面化学处理对混合溶胶-凝胶膜的界面粘附特性的影响。使用了不同的表面预处理，包括两种研磨处理和三种化学表面预处理，并评估了它们对表面化学和表面粗糙度的影响。通过扫描电子显微镜、X 射线光电子能谱、粗糙度测量和静态接触角表征表面。沉积了负载硝酸铈的混合溶胶-凝胶膜，并使用拉脱测试评估了对商业纯铝的附着力。统计分析表明，虽然在较粗糙的表面上获得了最高的附着力值，但表面羟基分数与附着力强度之间存在最强的相关性。