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Thermal-spraying coating hole sealing agent, preparation method and using method

A technology of sealing agent and thermal spraying, applied in coating, metal material coating process, melt spraying and other directions, can solve the problems of poor thermal stability and unsuitability, achieve good high temperature resistance and increase disorder. , the effect of improving stability

Inactive Publication Date: 2016-10-12
ANHUI MA STEEL SURFACE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its thermal stability is poor and it is not suitable for use in high temperature environments.

Method used

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  • Thermal-spraying coating hole sealing agent, preparation method and using method
  • Thermal-spraying coating hole sealing agent, preparation method and using method
  • Thermal-spraying coating hole sealing agent, preparation method and using method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] In this embodiment, 100 parts of phosphoric acid, 23 parts of aluminum hydroxide, 10 parts of chromic anhydride and 4 parts of methanol are used to prepare aluminum chromium phosphate.

[0034] First, heat it in a water bath to 80°C. At this temperature, mix and stir phosphoric acid and chromic anhydride until they are fully dissolved, then add aluminum hydroxide and stir until they are fully dissolved, then slowly drop in methanol to fully react, and then bathe in water for 20 minutes to obtain a dark green viscous thick aluminum chromium phosphate solution.

[0035] Add ethanol for dilution, the volume ratio of aluminum chromium phosphate and ethanol is 1:1.5.

[0036] Then add Cr 2 o 3 Filler, the weight ratio of diluted aluminum chromium phosphate and filler is 10:1 to make it evenly dispersed.

[0037] Use the method of brushing to evenly coat the sealing agent on the surface of the thermal spray coating, let it stand at room temperature for 24 hours, then heat ...

Embodiment 2

[0039] In this embodiment, 105 parts of phosphoric acid, 25 parts of aluminum hydroxide, 9.5 parts of chromic anhydride and 4 parts of methanol are used to prepare aluminum chromium phosphate.

[0040] First, heat it in a water bath to 70°C. At this temperature, mix and stir phosphoric acid and chromic anhydride until they are fully dissolved, then add aluminum hydroxide and stir until they are fully dissolved, then slowly drop in methanol to make it fully react, and then bathe in water for 15 minutes to obtain dark green viscous thick aluminum chromium phosphate solution.

[0041] Add ethanol for dilution, the volume ratio of aluminum chromium phosphate and ethanol is 1:1.5.

[0042] Then add Cr 2 o 3 Filler, the weight ratio of diluted aluminum chromium phosphate and filler is 10:1.5 to make it evenly dispersed.

[0043] Use the method of brushing to evenly coat the sealing agent on the surface of the thermal spray coating, let it stand at room temperature for 24 hours, t...

Embodiment 3

[0045] In this embodiment, 95 parts of phosphoric acid, 26.5 parts of aluminum hydroxide, 11.5 parts of chromic anhydride and 5 parts of methanol are used to prepare aluminum chromium phosphate.

[0046] First heat it in a water bath to 90°C, mix and stir phosphoric acid and chromic anhydride at this temperature until fully dissolved, then add aluminum hydroxide and stir until fully dissolved, then slowly drop in methanol to make it fully react, and then bathe in water for 25 minutes to obtain dark green viscous thick aluminum chromium phosphate solution.

[0047] Add ethanol for dilution, the volume ratio of aluminum chromium phosphate and ethanol is 1:1.

[0048] Then add Cr 2 o 3 Filler, the weight ratio of diluted aluminum chromium phosphate and filler is 10:1 to make it evenly dispersed.

[0049] Use the method of brushing to evenly coat the sealing agent on the surface of the thermal spray coating, let it stand at room temperature for 36 hours, and then heat the seale...

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Abstract

The invention discloses a thermal spraying coating sealing agent, a preparation method and a use method, comprising aluminum chromium phosphate and filler in a weight ratio of 10:1-3; the aluminum chromium phosphate comprises 95-105 parts by weight of phosphoric acid , 23-26.5 parts of aluminum hydroxide, 9.5-11.5 parts of chromic anhydride and 4-6 parts of methanol, and the filler is Cr 2 o 3 . Mix phosphoric acid and chromic anhydride, stir in water bath at 70-90°C until fully dissolved; then add aluminum hydroxide and stir until fully dissolved; then slowly drop methanol to make it fully react, and bathe in water at 70-90°C for 15- 25min, obtain dark green viscous aluminum chromium phosphate solution; Add Cr 2 o 3 The filler is uniformly dispersed in the aluminum chromium phosphate solution to obtain the sealing agent. After the system is solidified, as the temperature continues to rise, there will be no thermal effect in the system within 1000 ° C. Aluminum chromium phosphate has good high temperature resistance. The raw material of the sealing agent of the invention is cheap and easy to obtain, the application process is simple, the operation is convenient, and the sealing period is short.

Description

technical field [0001] The invention relates to a surface thermal spraying sealing technology for medium and low temperature furnace rolls, in particular to a thermal spraying coating sealing agent, a preparation method and a use method. Background technique [0002] Thermal spraying technology (referred to as HVOF) plays an important role in surface modification technology. This technology can be used to prepare coatings with good adhesion, high wear resistance, strong oxidation resistance and excellent corrosion resistance, but the elimination of pores is still a problem. A major problem. Sealing agent sealing is one of the commonly used and effective sealing methods for coatings. It is simple and easy to implement. Generally, a brush or spraying machine is used to penetrate the sealing agent into the pores and form a protective film after curing to isolate the outside. Corrosive medium to achieve sealing. Sealing agents are divided into two categories: organic and inorg...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/12C23C4/18
CPCC09D1/00C09D7/20C09D7/61C23C4/18
Inventor 朱广宏陈汪林张世宏李乐王硕煜倪振航胡小红
Owner ANHUI MA STEEL SURFACE TECH CO LTD
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