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High-temperature-resistant inorganic hole sealing agent for thermal spraying coating and preparation method of high-temperature-resistant inorganic hole sealing agent

A thermal spraying, high temperature resistant technology, used in coatings, anti-corrosion coatings, fire-resistant coatings, etc., can solve the problems of poor penetration of the sealing agent, insufficient sealing depth, and poor adhesion, and achieve good UV resistance and resistance. High temperature performance, avoidance of brittle failure, effect of excellent permeability

Inactive Publication Date: 2021-04-23
王维伦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the existing sealing agent has problems such as insufficient sealing depth, high temperature resistance, and easy embrittlement.
Use inorganic sol to replace the solid functional filler of traditional sealing agent, and then modify it with rare earth colloid to solve the technical problems of existing sealing agent such as poor permeability, high temperature resistance, curing shrinkage, and poor bonding force

Method used

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  • High-temperature-resistant inorganic hole sealing agent for thermal spraying coating and preparation method of high-temperature-resistant inorganic hole sealing agent

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preparation example Construction

[0036] The present invention also provides a preparation method of the above-mentioned high-temperature-resistant inorganic sealing agent for thermal spray coating, comprising the following steps:

[0037] Take the formulated amount of inorganic functional sol and rare earth sol, heat to 50~80°C, after the sol is completely dissolved at this temperature, add inorganic film-forming agent, stir evenly, then add stabilizer, and adjust the pH value after fully mixing to 2.5 to 5 to obtain a high temperature resistant inorganic sealing agent for thermal spray coatings.

[0038] The present invention also provides a method for using the above-mentioned high temperature resistant inorganic sealing agent for thermal spray coating, comprising the following steps:

[0039] a. Preheat the thermally sprayed workpiece at 50-60°C for 30-60 minutes, and evenly coat the well-stirred inorganic sealing agent on the surface of the workpiece. The coating method is atmospheric spraying, brushing o...

Embodiment

[0044] Example Preparation of the thermal spray coating of the present invention with high temperature resistant inorganic sealing agent

[0045] The specific operation steps are as follows:

[0046] (1) Preparation of inorganic film-forming agent, weigh 300g phosphoric acid, 80g aluminum hydroxide, 3gB 2 o 3 , magnesium oxide 200g, 465gH 2 O, the reaction generates 1000g colorless translucent solution A;

[0047] (2) Add 500g Al sol, 500g Zr sol, 250g TiO to the container in sequence 2 Sol, 125g lanthanum phosphate sol, 125g yttrium phosphate sol, heated to 50°C, stirred evenly to prepare solution B; slowly added solution A to solution B, and added 125g chromic anhydride, stirred until the solution was evenly dispersed.

[0048] Use the above sealing agent to seal the plasma sprayed Al2O3 ceramic coating, the steps are as follows:

[0049] Step 1. Preheat the thermally sprayed workpiece at 60°C for 30 minutes, and apply the above-mentioned inorganic sealing agent evenly ...

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Abstract

The invention belongs to the technical field of thermal spraying corrosion prevention, and particularly relates to a high-temperature-resistant inorganic hole sealing agent for a thermal spraying coating and a preparation method of the high-temperature-resistant inorganic hole sealing agent. Aiming at the problems of insufficient hole sealing depth, no high-temperature resistance, easiness in embrittlement and the like of an existing hole sealing agent, the invention provides the high-temperature-resistant inorganic hole sealing agent for the thermal spraying coating. The high-temperature-resistant inorganic hole sealing agent comprises the following components in percentage by weight: 30-40 percent of inorganic film-forming agent, 40-60 percent of inorganic functional sol, 1-10 percent of rare earth sol and 1-10 percent of stabilizer. The invention further provides a preparation method and a use method of the hole sealing agent. The hole sealing agent has better permeability, the hole sealing effect can be achieved more quickly, and the hole sealing depth can be increased; and meanwhile, the adhesive force is better, the toughness of the coating is better, and brittle failure after hole sealing is avoided. The invention provides a hole sealing agent with more excellent performance for the industry, and the hole sealing agent has very good economic benefits.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion thermal spraying, and in particular relates to a high-temperature-resistant inorganic sealing agent for thermal spraying coatings and a preparation method thereof. Background technique [0002] Thermal spraying coating is to heat the thermal spraying material to a plastic or molten state, and then undergo the acceleration of compressed air, so that the restricted particle beam impacts on the surface of the substrate, adheres to the surface of the substrate, and then cools and accumulates to form a Layered coating. The characteristics of the thermal spraying process determine that there are more or less pores in the coating, and the corrosive medium reaches the surface of the protected substrate through the pores, causing chemical or electrochemical corrosion between the coating and the substrate, resulting in cracking, peeling off of the coating, and eventually Coating fails. Therefore, r...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/61C09D5/34C09D5/08
CPCC09D1/00C09D5/08C09D5/18C09D5/34C09D7/61
Inventor 王维伦
Owner 王维伦
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