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

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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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

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