High-temperature-corrosion-resistant paint, preparation method thereof, high-temperature-corrosion-resistant coating and preparation method thereof

A high-temperature corrosion-resistant and coating technology, applied in anti-corrosion coatings, metal material coating processes, coatings, etc., can solve the problems affecting the wide application of supercritical thermal power units, limiting the effective operation of supercritical thermal power units, etc., to improve smoke resistance. Gas erosion performance, good surface condition, effect of improving compactness

Active Publication Date: 2017-10-10
国家能源集团科学技术研究院有限公司武汉分公司 +3
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  • Application Information

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Problems solved by technology

It can be seen that the high-temperature corrosion problem on the surface of components in thermal power plant boilers limits the effective operation of supercritical thermal power units and affects the wide application of supercritical thermal power units

Method used

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  • High-temperature-corrosion-resistant paint, preparation method thereof, high-temperature-corrosion-resistant coating and preparation method thereof
  • High-temperature-corrosion-resistant paint, preparation method thereof, high-temperature-corrosion-resistant coating and preparation method thereof
  • High-temperature-corrosion-resistant paint, preparation method thereof, high-temperature-corrosion-resistant coating and preparation method thereof

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preparation example Construction

[0038] The present invention also provides a preparation method of the high-temperature corrosion-resistant coating described in the above technical solution, comprising the following steps:

[0039] (1) mixing ceramic powder and metal powder, and carrying out high-energy ball milling to obtain cermet powder;

[0040] (2) mixing chromium, nickel and the cermet powder obtained in the step (1) to obtain a high-temperature corrosion-resistant coating.

[0041] The invention mixes the ceramic powder and the metal and performs high-energy ball milling to obtain the cermet powder. The present invention has no special requirements on the method of mixing the ceramic powder and the metal, and the material mixing method well known to those skilled in the art can be used. In an embodiment of the present invention, the mixing of the ceramic powder and the metal is specifically stirring and mixing; the rotation speed of the stirring and mixing is preferably 100-300r / min, more preferably ...

Embodiment 1

[0064] (1) Cr with a particle size of 0.5 microns 3 C 2 Powder and spherical CeO with a particle size of 5 nm 2 The powder is mixed in a mass ratio of 4:1 to make a uniformly mixed ceramic powder, and the aluminum with a particle size of 3 μm and the titanium with a particle size of 3 μm are mixed in a mass ratio of 3:1 to obtain a metal powder; ceramic powder and metal The powder is mixed according to the mass ratio of 1:1, and the high-energy ball milling is carried out under the protection of argon for 5 hours, and the ball milling time of the high-energy ball mill is 4.5h, the speed is 350r / min, and the ball-to-material ratio is 30:1 to make titanium and / or aluminum Encapsulated ceramic powder. According to the mass percentage, 50% of chromium, 36% of nickel, and 14% of metal-wrapped ceramic powder are uniformly mixed to obtain thermal spray powder, that is, a high-temperature corrosion-resistant coating.

[0065] (2) Taking No. 20 carbon steel with a specification of 6...

Embodiment 2

[0073] (1) Cr with a particle size of 10 microns 3 C 2 Powder and spherical CeO with a particle size of 30 nm 2 The powder was mixed mechanically at a mass ratio of 3:1 and at a speed of 150r / min for 10 minutes to obtain ceramic powder; aluminum with a particle size of 1 μm and titanium with a particle size of 1 μm were configured at a mass ratio of 2.2:1, and mechanically mixed at a speed of 150r / min Mix for 10 minutes to obtain metal powder; mix ceramic powder and metal powder according to the mass ratio of 1:1, and perform high-energy ball milling under the protection of argon for 5 hours, wherein the rotation speed is 320r / min, and the ball-to-material ratio is 25:1 to obtain titanium and / or aluminum coated ceramic powder. According to the mass percentage of 54% chromium, 33% nickel, and 13% ceramic powder wrapped in titanium and / or aluminum, the three powders were mechanically mixed at 150r / min for 10 minutes, and mixed evenly to prepare a thermal spray powder, that i...

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Abstract

The invention provides high-temperature-corrosion-resistant paint, a preparation method thereof, a high-temperature-corrosion-resistant coating and a preparation method thereof. The high-temperature-corrosion-resistant paint comprises chromium, nickel and metal ceramic powder, the metal ceramic powder is ceramic powder with the surface coated with aluminum and / or titanium metal powder, and the ceramic powder comprises Cr3C2 and CeO2. The preparation method of the paint includes: mixing the ceramic powder comprising Cr3C2 and CeO2 with metal comprising titanium and aluminum, performing high-energy ball milling to obtain the metal ceramic powder, and then mixing the metal ceramic powder with chromium and nickel to obtain the high-temperature-corrosion-resistant paint. The preparation method of the paint includes: spraying the paint to the surface of a substrate at supersonic speed to obtain the coating. High-energy ball milling is adopted to realize coating of ceramic by metal, so that decomposition of Cr3C2 in the process of thermal spraying is reduced effectively; titanium and aluminum are low in melting point and are wrapped on the surfaces of Cr3C2 and CeO2, so that improving of compactness of the coating is facilitated; Cr3C2 and CeO2 are hard in texture, so that improving of smoke washout resistance of the coating is facilitated.

Description

technical field [0001] The invention belongs to the technical field of surface anticorrosion, and in particular relates to a high-temperature corrosion-resistant coating and a preparation method thereof, and a high-temperature corrosion-resistant coating and a preparation method thereof. Background technique [0002] Corrosion has a wide range of influences and brings huge economic losses to the national economy. Before the 1950s, the definition of corrosion was limited to metal corrosion. Since the 1950s, many authoritative corrosion scholars or research institutions tend to expand the definition of corrosion to all materials. But usually refers to the damage of metal. Because metals and their alloys are still the most important structural materials, metal corrosion is still one of the most attractive problems. Corrosion causes huge direct losses to alloy materials, and the huge harm of corrosion is not only reflected in economic losses, but also brings heavy casualties,...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/10C09D5/03C09D7/12B05D1/02C23C4/129C23C4/06
CPCB05D1/02C09D1/00C09D5/033C09D5/10C09D5/103C09D5/18C23C4/06C23C4/129
Inventor 毛晓飞章亚林裴锋黄健航刘光明李华才
Owner 国家能源集团科学技术研究院有限公司武汉分公司
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