▎ 摘　　要

NOVELTY - Preparing graphene oxide modified stainless steel surface anti-corrosive film, comprises e.g. (i) sanding stainless steel surface, polishing, (ii) preparing synthetic solution of Silicalite-1 molecular sieve, placing synthetic solution in high-temperature and high-pressure reactor, performing hydrothermal synthesis reaction, (iii) dissolving vinyltriethoxysilane in ethanol aqueous solution, (iv) placing Silicalite-1 molecular sieve powder in silane coupling agent solution, pre-impregnating pre-treated stainless steel in above Silicalite-1 molecular sieve/silane coupling agent mixed solution, (v) reacting graphene oxide dispersion, Silicalite-1 molecular sieve/silane coupling agent mixed solution and dimethylformamide, immersing pre-impregnated stainless steel in Silicalite-1 molecular sieve/silane coupling agent/graphene oxide composite solution and (vi) hot-pressing obtained stainless steel with graphene oxide modified silane coupling agent/molecular sieve anticorrosive film. USE - The method is useful for preparing graphene oxide modified stainless steel surface anti-corrosive film. ADVANTAGE - The film: has high corrosion resistance and excellent surface adhesion. The method: has simple operation; utilizes graphene oxide to reduce the corrosion current density, and increases the corrosion resistance of molecular sieve membrane; utilizes silane coupling agent, which dehydrates and condenses with metal surface and molecular sieve; improves binding force between stainless steel and molecular sieve; and is environmentally friendly. DETAILED DESCRIPTION - Preparing graphene oxide modified stainless steel surface anti-corrosive film, comprises (i) sanding the surface of stainless steel with sandpaper for multiple times to remove surface scratches, then polishing, and performing ultrasonic cleaning with acetone, absolute ethanol and deionized water respectively to obtain pre-treated stainless steel, (ii) preparing synthetic solution of Silicalite-1 molecular sieve using ethyl orthosilicate as silicon source, tetrapropylammonium hydroxide as template agent, and deionized water, then placing above synthetic solution in high-temperature and high-pressure reactor under stirring conditions, performing hydrothermal synthesis reaction at high temperature, taking out the solution, then centrifuging, and drying to obtain Silicalite-1 molecular sieve powder, (iii) dissolving vinyltriethoxysilane in aqueous solution of ethanol and mixing uniformly, then adjusting the pH to 5-7 using acetic acid to obtain silane coupling agent solution, (iv) placing the above Silicalite-1 molecular sieve powder in silane coupling agent solution, then performing magnetic stirring and ultrasonic vibration alternately to completely dissolve Silicalite-1 molecular sieve powder in silane coupling agent solution to obtain Silicalite-1 molecular sieve/silane coupling agent mixed solution, then pre-impregnating pre-treated stainless steel in above Silicalite-1 molecular sieve/silane coupling agent mixed solution, and placing at constant temperature electric drying oven for drying, (v) mixing graphene oxide dispersion, Silicalite-1 molecular sieve/silane coupling agent mixed solution and dimethylformamide, then reacting under magnetic stirring at 65-75 degrees C to obtain Silicalite-1 molecular sieve/silane coupling agent/graphene oxide composite solution, immersing pre-impregnated stainless steel in Silicalite-1 molecular sieve/silane coupling agent/graphene oxide composite solution, reacting under magnetic stirring to obtain graphene oxide modified silane coupling agent/molecular sieve anticorrosive film on the surface of stainless steel, then taking out and drying, and (vi) hot-pressing the obtained stainless steel with graphene oxide modified silane coupling agent/molecular sieve anticorrosive film using hydraulic press, and slowly cooling to obtain final product.