Method for preparing temperature-resistant and corrosion-resistant aluminum oxide/organic silicon/silicon dioxide hybridized coating

Abstract

The invention provides a method for preparing a temperature-resistant and corrosion-resistant aluminum oxide / organic silicon / silicon dioxide hybridized coating. The preparation method comprises the following steps of: preparing an organic silicon / silicon dioxide hybridized sol by using tetraethoxysilane as an inorganic phase precursor and methyl triethoxyl silane and diphenyl dimethyl silane as an organic phase precursor through a sol-gel method; preparing aluminum sol by using sec-butyl alcohol aluminum as an aluminum source through the sol-gel method; and then adding the aluminum sol into the organic silicon / silicon dioxide sol through a sol blending method, and preparing the aluminum oxide / organic silicon / silicon dioxide hybridized sol by using acetic acid as gel and a carbonyl-contained amide compound as a dry control chemical addition agent. The coating prepared by the invention has a good physical property. The hardness of the coating is 0.8825, the anti-impact intensity of the coating is 50 kg.cm, and the flexibility of the coating is 1 mm. The coating coated on an LY12 aluminum alloy plate is not destructive after being roasted at a temperature of 450 DEG C for 1 hour. The surface of the coating is non-corrosive after the coating salt spray test is carried out for 1368 hours.

Description

technical field [0001] The invention relates to a method for preparing a high-temperature-resistant and corrosion-resistant coating, in particular to a method for preparing a high-temperature-resistant and corrosion-resistant alumina / organosilicon / silicon dioxide hybrid coating. Background technique [0002] With the development of science and technology, the requirements for various materials have become higher and higher. Although inorganic materials have the characteristics of high strength, high rigidity, high hardness, and aging resistance, they also have disadvantages such as high molding temperature, single surface group, and brittle quality; organic polymer materials have good toughness, elasticity, and processability, but High temperature resistance and aging resistance are not ideal, and it often shows a higher melting viscosity at higher temperatures, and lacks sufficient stability to common solvents. It can be seen that the conventional materials with a single c...

AI Technical Summary

Problems solved by technology

Although inorganic materials have the characteristics of high strength, high rigidity, high hardness, and aging resistance, they also have disadvantages such as high molding temperature, single surface group, and brittle quality; organic polymer materials have good toughness, elasticity, and processability, but High temperature resistance and aging resistance are not ideal, and it often shows a higher melting viscosity at higher temperatures, and lacks sufficient stability to common solvents

It can be seen that the conventional materials with a single component can no longer meet the actual needs. The composite materials with excellent performance prepared by the functional compounding, performance complementation and optimization of two or more materials are the development trend of modern materials and have broad application prospects.

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