An inorganic–organic coating based on methacrylic-functionalized silica and zirconia was synthesized by sol-gel technology as replacer of Cr(VI)-based treatments used to protect both unconverted and electrically converted AA2024-T3 for aeronautic application. The effect of a bi-methacrylate organic precursor in the formulation was studied with the aim to reduce the sol viscosity and coating thickness while crosslink was increased and volatile organic compounds (VOC) were diminished in the formulation. The viscoelastic behavior was studied by rheometry, and the properties of the coating material were related to its corrosion protection capability, studied by electrochemical impedance spectroscopy and neutral salt spray tests. The mechanical properties of the resulting coatings were studied by dynamic microindentation and rotary wear tests. The formulations containing the organic precursor provided coatings with higher degree of crosslinking and lower VOC. The derived coatings were thinner and provided outstanding corrosion protection with low thickness on unconverted AA2024-T3 and as sealant of hard sulfuric acid anodized AA2024-T3. The hardness was improved in comparison to coatings without the organic precursor although abrasion resistance was better for coatings with higher inorganic character.

通过溶胶-凝胶技术合成了一种基于甲基丙烯酸官能化二氧化硅和氧化锆的无机-有机涂层，作为 Cr(VI) 基处理的替代品，用于保护未转化和电转化的 AA2024-T3 用于航空应用。研究了配方中双甲基丙烯酸酯有机前体的影响，目的是降低溶胶粘度和涂层厚度，同时增加交联度并减少配方中的挥发性有机化合物 (VOC)。通过流变学研究了涂层材料的粘弹性行为，通过电化学阻抗谱和中性盐雾试验研究了涂层材料的性能与其防腐能力有关。通过动态显微压痕和旋转磨损试验研究所得涂层的机械性能。含有有机前体的配方为涂料提供了更高的交联度和更低的 VOC。衍生的涂层更薄，在未转化的 AA2024-T3 和作为硬硫酸阳极氧化 AA2024-T3 的密封剂上提供了出色的腐蚀保护，且厚度低。与不含有机前体的涂层相比，硬度有所提高，尽管耐磨性对于具有较高无机特性的涂层更好。