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为了提高铝合金的耐腐蚀性能、耐磨损性能及硬度,通过溶胶-凝胶反应,以纳米硅溶胶为主要原料,有机硅烷为偶联剂,制备了新型纳米SiO2防腐蚀涂料。通过浸渍-提拉法在铝合金(LY12)基体表面形成涂层,通过改变硅溶胶的含量,详细研究了此涂层的显微硬度、耐磨性能和耐腐蚀性能与硅溶胶含量的关系。结果显示,新型有机-无机杂化纳米SiO2涂层厚度为20μm时具有良好的耐腐蚀性能和耐磨性能,由此而使此杂化膜替代对环境有害的铬酸盐转化膜成为可能,并为有机-无机杂化纳化材料的应用提供了理论依据。
In order to improve the corrosion resistance, wear resistance and hardness of the aluminum alloy, a novel nano-SiO2 anti-corrosion coating was prepared by sol-gel reaction, nano-silica sol as the main raw material, and organic silane as the coupling agent. The coating was formed on the surface of aluminum alloy (LY12) by dipping-pulling method. The relationship between the microhardness, wear resistance, corrosion resistance and content of silica sol was studied in detail by changing the content of silica sol. The results show that the new organic-inorganic hybrid nano-SiO2 coating has a good corrosion resistance and wear resistance when the thickness is 20μm, which makes it possible to substitute this hybrid membrane for environmentally harmful chromate conversion coating It provides a theoretical basis for the application of organic-inorganic hybrid nanomaterials.