Graphene-based high-temperature coating and preparation method thereof
A graphene-based, graphene-based technology, used in anti-corrosion coatings, alkali metal silicate coatings, coatings, etc., can solve the problems of high strength, high wear resistance, high toughness, corrosion resistance, oxidation resistance, high temperature resistance, loss of Protection effect, surface cracking of alloy coating, etc., to achieve the effect of construction difficulty and cost reduction
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Embodiment 1
[0039] Preparation of graphene dispersion: First, 2.4 kg of boron nitride nanosheets and 25.2 kg of water were stirred and dispersed at a high speed of 1500 rad / min for 10 minutes, and then 2.4 kg of graphene nanosheets were added to it, continued high-speed stirring for 20 minutes and ultrasonication for 10 minutes to obtain Uniform and stable graphene dispersion;
[0040] Preparation of graphene high-temperature coating: add 35 kg of water glass solution and 7 kg of water into a stirring container, then add the graphene dispersion obtained above under the condition of high-speed stirring at 1500 rad / min, and continue to add 14 kg of zirconia powder after stirring evenly and 14 kilograms of metal nickel powder, after mixing and stirring, use a sand mill to grind it to a fineness below 15 μm, and filter to obtain the required graphene-based high-temperature coating.
Embodiment 2
[0042] Preparation of graphene dispersion: First, 1 kg of boron nitride nanosheets and 18 kg of water were stirred and dispersed at a high speed of 1500 rad / min for 10 minutes, then 1 kg of graphene nanobelts were added to it, continued high-speed stirring for 20 minutes and ultrasonication for 10 minutes to obtain Uniform and stable graphene dispersion;
[0043] Preparation of graphene high-temperature coating: Add 32 kg of aluminum dihydrogen phosphate aqueous solution and 23.2 kg of water into the stirring container, then add the graphene dispersion obtained above under the condition of high-speed stirring at 1500 rad / min, and continue to add 12 kg of alumina after stirring evenly The powder and 12.8 kg of aluminum-silicon alloy powder are mixed and evenly ground with a sand mill until the fineness is below 15 μm, and filtered to obtain the required graphene-based high-temperature coating.
Embodiment 3
[0045] Preparation of graphene dispersion: First, 2.8 kg of boron nitride nanosheets and 31.15 kg of water were stirred and dispersed at a high speed of 1500 rad / min for 10 minutes, then 1.05 kg of multilayer graphene was added to it, continued high-speed stirring for 20 minutes and ultrasonication for 10 minutes to obtain Uniform and stable graphene dispersion;
[0046] Preparation of graphene high-temperature coating: Add 16.25 kg of silica sol aqueous solution and 16.25 kg of water into the stirring container, then add the graphene dispersion obtained above under the condition of high-speed stirring at 1500 rad / min, and continue to add 19.5 kg of silicon nitride powder after stirring evenly Body and 13 kg of chromium powder, after mixing and stirring, use a sand mill to grind it to a fineness below 15 μm, and filter to obtain the required graphene-based high-temperature coating.
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