High-temperature lubricating anti-penetration nano environmental protection coating and preparation and use methods thereof

Abstract

The invention discloses a high-temperature lubricating anti-penetration environmental protection coating, which is prepared from the following components in percentage by weight: 25 to 40 percent of boron nitride, 0.5 to 10 percent of nano alumina, 10 to 15 percent of silica sol, 1 to 5 percent of liquid sodium silicate, 10 to 15 percent of aluminum sol, 1 to 5 percent of nano silica, 0.5 to 2.5 percent of bentonite, 0.5 to 1.0 percent of soft clay and 35 to 50 percent of pure water. The coating disclosed by the invention has high temperature resistance and can be widely applied to surfaces ofrefractory materials such as a launder, a distribution plate, a distribution flow tank, a filter box, an adapter plate, a skimmer and a casting table lining, which are in contact with aluminum alloyliquid, thereby protecting the refractory material from scouring, erosion and penetration of the aluminum alloy liquid, and more importantly, protecting the aluminum alloy liquid from pollution of thealuminum alloy liquid; meanwhile, the materials selected by the invention are all inorganic materials, so that the coating is an environmental protection coating. The invention further discloses a preparation method and a use method of the coating.

Description

technical field

[0001] The invention relates to a high-temperature lubricating anti-penetration environmental protection coating and a preparation and application method thereof, belonging to the field of inorganic non-metallic materials. Background technique

[0002] With the large-scale, high-speed, and large-scale equipment of aviation, aerospace, automobiles, and ships, higher requirements are put forward for the performance indicators of aluminum alloy structural materials such as high-strength deformation, high-tough deformation, high-strength heat resistance, and high-strength plasticity. The amount is also increasing, so a new concept is proposed for the refractory material used in the aluminum alloy melt channel, so that the refractory material neither sticks to the aluminum melt nor chemically reacts with the refractory material, so a kind of It is a high-temperature-resistant coating that can be evenly painted on the surface of the refractory material and adhered ...

Examples

Embodiment 1

[0089] A high-temperature lubricating anti-penetration nano-environmental protection coating, which consists of 30% boron nitride, 0.5% nano-alumina, 10% silica sol, 1% liquid sodium silicate, 10% aluminum sol, and 1% nano-silica according to weight percentage. %, bentonite 0.5%, soft clay 0.5%, pure water 46.5%.

Embodiment 2

[0091] A high-temperature lubricating anti-penetration nano-environmental protection coating, according to the weight percentage, consists of 25% hexagonal boron nitride, 5% nano-alumina, 10% silica sol, 5% liquid sodium silicate, 10% aluminum sol, and nano-silica 5%, bentonite 2.5%, soft clay 1.0%, pure water 36.5%.

Embodiment 3

[0093] A high-temperature lubricating anti-penetration nano-environmental protection coating, which consists of 40% of hexagonal boron nitride with a particle size of 5-10 μm and 10-20 μm, 0.5% of nano-alumina, 10% of silica sol, and 2.5% of liquid sodium silicate. , aluminum sol 10%, nano silicon dioxide 1%, bentonite 0.5%, soft clay 0.5%, pure water 35%.

technical field

[0001] The invention relates to a high-temperature lubricating anti-penetration environmental protection coating and a preparation and application method thereof, belonging to the field of inorganic non-metallic materials. Background technique

[0002] With the large-scale, high-speed, and large-scale equipment of aviation, aerospace, automobiles, and ships, higher requirements are put forward for the performance indicators of aluminum alloy structural materials such as high-strength deformation, high-tough deformation, high-strength heat resistance, and high-strength plasticity. The amount is also increasing, so a new concept is proposed for the refractory material used in the aluminum alloy melt channel, so that the refractory material neither sticks to the aluminum melt nor chemically reacts with the refractory material, so a kind of It is a high-temperature-resistant coating that can be evenly painted on the surface of the refractory material and adhered ...

Examples

Embodiment 1

[0089] A high-temperature lubricating anti-penetration nano-environmental protection coating, which consists of 30% boron nitride, 0.5% nano-alumina, 10% silica sol, 1% liquid sodium silicate, 10% aluminum sol, and 1% nano-silica according to weight percentage. %, bentonite 0.5%, soft clay 0.5%, pure water 46.5%.

Embodiment 2

[0091] A high-temperature lubricating anti-penetration nano-environmental protection coating, according to the weight percentage, consists of 25% hexagonal boron nitride, 5% nano-alumina, 10% silica sol, 5% liquid sodium silicate, 10% aluminum sol, and nano-silica 5%, bentonite 2.5%, soft clay 1.0%, pure water 36.5%.

Embodiment 3

[0093] A high-temperature lubricating anti-penetration nano-environmental protection coating, which consists of 40% of hexagonal boron nitride with a particle size of 5-10 μm and 10-20 μm, 0.5% of nano-alumina, 10% of silica sol, and 2.5% of liquid sodium silicate. , aluminum sol 10%, nano silicon dioxide 1%, bentonite 0.5%, soft clay 0.5%, pure water 35%.

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