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Pore sealing agent and pore sealing process for improving long-term corrosion resistance of supersonic speed flame sprayed iron-based amorphous coating

A supersonic flame, iron-based amorphous technology, applied in metal material coating process, coating, melting spraying and other directions, can solve the problem of inability to achieve sealant sealing, achieve good storage stability, convenient operation, improve The effect of long-term corrosion resistance

Inactive Publication Date: 2018-03-13
INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of sealing agent and hole sealing process that can improve the long-term corrosion resistance of supersonic flame sprayed iron-based amorphous coating, and the sealing agent can be improved in the pores of the coating through the method of ultrasonic vibration excitation. In order to solve the technical problem that the conventional sealing method cannot realize the deep sealing of the sealant to the supersonic flame sprayed coating

Method used

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  • Pore sealing agent and pore sealing process for improving long-term corrosion resistance of supersonic speed flame sprayed iron-based amorphous coating
  • Pore sealing agent and pore sealing process for improving long-term corrosion resistance of supersonic speed flame sprayed iron-based amorphous coating
  • Pore sealing agent and pore sealing process for improving long-term corrosion resistance of supersonic speed flame sprayed iron-based amorphous coating

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Embodiment 1

[0028] The preparation process of the supersonic flame spraying iron-based amorphous coating used in the present embodiment is as follows:

[0029] Amorphous powders were prepared by ultrasonic gas atomization equipment. The shape of the powder particles is as figure 1 . It can be seen from the figure that the powder is mostly spherical with a small amount of satellite tissue. The fluidity of the powder is 16.8s / 50g, suitable for HVAF supersonic flame spraying. The powder is amorphous with a small amount of amorphous phase.

[0030] The above-mentioned powder (with a particle size of 15 μm to 52 μm) is used as a spraying raw material, and an amorphous alloy coating (the base is ordinary carbon steel) is prepared by using HVAF supersonic flame spraying equipment. First, the substrate is degreased and derusted, and the surface of the substrate is blasted with a spray gun to increase the roughness of the surface. The specific process parameters of HVAF supersonic flame spray...

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Abstract

The invention discloses a pore sealing agent and a pore sealing process for improving the long-term corrosion resistance of a supersonic speed flame sprayed iron-based amorphous coating, and belongs to the technical field of coating pore sealing processes. The pore sealing agent is a solution formed by dissolving Al(OH)3 in phosphoric acid at a certain temperature. According to the pore sealing process, an iron-based amorphous coating is soaked into the pore sealing agent, treatment is performed for 5 h under the excitation of ultrasonic vibration, and heat treatment is performed, wherein theheat treatment comprises carrying out thermal insulatin for 2 h at a temperature of 110 DEG C, carrying out thermal insulatin for 2 h at a temperature of 200 DEG C, and thermal insulatin for 1.5 h ata temperature of 350 DEG C so as to obtain the pore sealing cating with long-term corrosion resistance. According to the present invention, with the pore sealing process, the deep and effective sealing on the supersonic speed flame sprayed iron-based amorphous coating can be achieved, and the long-term corrosion resistance and the service life of the coating in the corrosive environment can be improved; the pore sealing agent is the non-toxic inorganic pore sealing agent; and the preparatin process is simple, the operation is convenient, and the prepared pore sealing agent has good storage stability.

Description

technical field [0001] The invention relates to the technical field of coating sealing technology, in particular to a sealing agent and a sealing process for improving the long-term corrosion resistance of supersonic flame sprayed iron-based amorphous coatings. Background technique [0002] For materials serving in the marine environment, long-term corrosion resistance is one of the key requirements for safe service of equipment. Amorphous alloys have attracted widespread attention because of their uniform composition, no crystal defects, high strength, high hardness, and excellent wear and corrosion resistance. Thermal spraying technology has a high cooling rate, which is conducive to the formation of amorphous structure, and has become a powerful driving force for the application of amorphous alloys. Among them, supersonic flame spraying is another major invention after plasma spraying technology. However, many factors in the coating preparation process (such as oxygen, g...

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Application Information

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IPC IPC(8): C23C4/18C23C4/129C23C4/06
Inventor 胡红祥刘明明郑玉贵岳智君徐红艳高新华张海燕高超
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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