Effect of water-silicon ratio on anticorrosive properties of silicalite-1 molecular sieve membrane on the surface of open-cell foamed aluminum

摘要

In this paper, the effect of the water-silicon ratio of the molecular sieve synthesis solution on the molecular sieve anticorrosive film during the preparation of the silicalite-1 molecular sieve membrane by the secondary growth method was studied. In order to enhance the bonding force between the foamed aluminum and the molecular sieve anticorrosive film, the silane coupling agent was used as the connection layer to study the film-forming effect and anticorrosive effect of the molecular sieve film when the water-silicon ratio was 100, 200, and 300. Scanning electron microscope and X-ray diffraction were used to analyze the morphology and composition of the anticorrosive film, and the corrosion resistance of the film was analyzed by electrochemical impedance spectroscopy. The results show that the surface of the silicalite-1 anticorrosive film prepared with a water-silicon ratio of 200: 1 is the most dense, and the crystallinity and anticorrosive performance are the best. On this basis, the film formation mechanism and anticorrosive mechanism of the silicalite-1 anticorrosive film on the surface of aluminum foam were analyzed.