Polymeric epoxy-based composites are modified with nanopowders of silicon oxide (approx 100nm). By the method of spraying, these composites are applied to specimens of 2024-T3 aluminum alloy preliminary treated with molybdate solutions to get conversion layers. Three types of polymeric coatings are considered: reference, treated by silica, and with additional polyurethane coatings. The aim of modification of polymeric coatings is to absorb and/or block unwanted ions/ molecules (Cl~-, O_2, OH~-, H_2 O, etc.) and improve the protective properties of the films. The tests carried out by the method of electrochemical impedance spectroscopy, in a salt-fog chamber, and by immersion in a 0.5 M NaCl solution reveal high anticorrosion characteristics of the coating. New coatings are promising for the corrosion protection in the aircraft industry.
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机译：聚合环氧树脂基复合材料用纳米氧化硅粉（约100nm）改性。通过喷涂方法，将这些复合材料应用于经过钼酸盐溶液初步处理的2024-T3铝合金样品上，以获得转化层。考虑了三种类型的聚合物涂料：参考涂料，二氧化硅处理的涂料以及其他聚氨酯涂料。改性聚合物涂层的目的是吸收和/或阻止有害的离子/分子（Cl〜-，O_2，OH〜-，H_2O等）并改善薄膜的保护性能。通过电化学阻抗光谱法，在盐雾室中并浸入0.5 M NaCl溶液中进行的测试显示了涂层的高防腐特性。新涂层有望在飞机工业中起到防腐作用。
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