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High temperature resistant environment-friendly nano modified inorganic coating, its preparation method and application

A nano-modified, inorganic coating technology, applied in the field of high temperature protection of alloys, can solve problems such as spalling of inorganic coatings, achieve the effects of improving strength, improving oxidation resistance and thermal shock performance, and avoiding stress concentration

Active Publication Date: 2012-02-15
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a high temperature resistant environment-friendly nano-modified inorganic coating and its preparation method and application, to solve the problems in the prior art that the inorganic coating is easier to peel off from the base material, and the coating has high temperature resistance, anti Corrosion, water resistance, good thermal shock resistance, non-toxic, non-polluting coating, which is conducive to environmental protection

Method used

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  • High temperature resistant environment-friendly nano modified inorganic coating, its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take by weighing 500g of potassium silicate with a modulus of 3.5, 200g of aluminum tripolyphosphate, 20g of nano-Cr powder with a particle diameter of 50nm, 30g of nano-Ti powder with a particle diameter of 50nm, and 200g of aluminum oxide with a particle diameter of 2 μm. 50 g of Zn powder with a diameter of 10 μm. Pre-mix aluminum tripolyphosphate, nano-Cr powder, nano-Ti powder, aluminum oxide and Zn powder, add in potassium silicate and mix thoroughly while stirring, add 200g of distilled water and 500g of zirconium silicate beads with a particle size of 1mm, After stirring for 15 minutes at a speed of 2300 rpm in a mixer, the coating was obtained by filtering through a 200-mesh sieve. Spray or brush the paint onto the surface of the sandblasted γ-TiAl alloy parts by spraying or brushing. After the surface is dry for 6 minutes, put it in a resistance furnace with a furnace temperature of 250 ° C for 1.5 hours. After taking it out for air cooling, a high temperatur...

Embodiment 2

[0032] Weigh 800g of potassium silicate with a modulus of 4.0, 200g of aluminum tripolyphosphate, 100g of nano-Cr powder with a particle size of 50nm, 100g of nano-Ti powder with a particle size of 50nm, and 800g of aluminum oxide with a particle size of 50μm. Pre-mix aluminum tripolyphosphate, nano-Cr powder, nano-Ti powder and aluminum oxide powder, add to potassium silicate and mix thoroughly while stirring, add 500g of distilled water and 1000g of agate beads with a particle size of 1.5mm, and put them in the mixer with After stirring at a rotational speed of 2500 rpm for 10 minutes, the coating was obtained by filtering through a 200-mesh sieve. The paint is sprayed or brushed or brushed onto the surface of the sandblasted TA11 alloy parts by spraying or brushing, and after curing at room temperature for 24 hours, a high temperature resistant protective coating is obtained.

[0033] In the present embodiment, the performance parameters of the high temperature resistant pr...

Embodiment 3

[0036] Weigh 300g of potassium silicate with a modulus of 3.0, 40g of aluminum tripolyphosphate, 2.5g of nano-Cr powder with a particle size of 80nm, 7.5g of nano-Ti powder with a particle size of 50nm, and 150g of aluminum oxide with a particle size of 40μm . Pre-mix aluminum tripolyphosphate, nano-Cr powder, nano-Ti powder and aluminum oxide powder, add to potassium silicate and mix well while stirring, add 125g of distilled water and 250g of stainless steel beads with a particle size of 1mm, in the mixer at 2100rpm After stirring at a rotating speed of 12 minutes, the coating was obtained after filtering through a 200-mesh sieve. Spray or brush the paint onto the surface of the sandblasted TC4 alloy parts by spraying or brushing. After the surface is dry for 10 minutes, put it in a resistance furnace with a furnace temperature of 280 ° C for 2 hours. After taking it out for air cooling, a high temperature resistant protective coating is obtained.

[0037] In the present e...

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Abstract

The invention, relating to an alloy high temperature protection technology, discloses a high temperature resistant environment-friendly nano modified inorganic coating, its preparation method and application. The coating comprises liquid potassium metasilicate, aluminium trippolyhosphate, aluminium oxide, nano metal powder and Zn powder. The preparation method comprises the following steps: uniformly mixing aluminium trippolyhosphate, aluminium oxide, nano metal powder and Zn powder to obtain a mixture; then, adding the mixture in potassium metasilicate with stirring and fully mixing; adding distilled water in the mixture obtained by the last step, stirring in a mixer with the rotating speed of 2000-2600 rpm for 5-30 min, and then filtering with 200-mesh sieve to obtain the coating, wherein, the weight ratio of distilled water to the mixture obtained by the last step is 1: (3-10). According to the invention, the problems that inorganic coating is easy to peel of base material and the like existing in the prior art are solved. The coating has the advantages of high temperature resistance, corrosion resistance, water resistance, good thermal shock resistance, no toxicity, no pollution, and favorable environmental protection, and is suitable for alloy products operating in high temperature environment.

Description

technical field [0001] The invention relates to high-temperature protection technology for alloys, in particular to a high-temperature-resistant and environment-friendly nano-modified inorganic coating, a preparation method and application thereof. Background technique [0002] TiAl alloy is considered as an ideal high-temperature structural material due to its excellent mechanical properties, such as high strength and high elastic modulus under high temperature conditions. Under high temperature conditions, the oxidation resistance of TiAl alloy is weak, and Al 2 o 3 and less protective rutile TiO 2 mixture instead of dense α-Al 2 o 3 The protective film limits its further application. [0003] Organic coatings have a long history of application as protective coatings for metal materials, but one disadvantage of organic coatings is that they contain organic solvents, which are very detrimental to the protection of the environment, and most organic coatings cannot be us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26
Inventor 王成朱圣龙王福会王文李文波
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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