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Anti-shedding carbon nano paint and preparation method thereof

A nano-coating and anti-decarburization technology, used in polyether coatings, coatings, etc., can solve problems such as increased process energy consumption, unstable product quality, and inability to accurately control particle size distribution, achieving strong natural peeling ability, formulation And the coating process is simple and easy, and the effect of preventing high temperature oxidation and decarburization

Inactive Publication Date: 2016-02-10
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method increases the energy consumption of the process, and the particle size distribution after ball milling cannot be accurately controlled, resulting in unstable product quality

Method used

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  • Anti-shedding carbon nano paint and preparation method thereof
  • Anti-shedding carbon nano paint and preparation method thereof
  • Anti-shedding carbon nano paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The quality of each chemical composition of the anti-decarburization nano-coating is as shown in Table 1:

[0029] Table 1 embodiment 1 prepares the raw material of coating and proportioning

[0030]

[0031] Weigh Al(NO 3 ) 3 and NH 4 HCO 3 were dissolved in deionized water to form solutions. Add refined diatomaceous earth to NH 4 HCO 3 Stir the solution into a suspension, and slowly add Al(NO 3 ) 3 solution for a precipitation reaction. Filter and wash the resulting precipitate and heat it at 200-300°C for 30 minutes to obtain nano-Al 2 o 3 and diatomaceous earth mixture. Sodium polyacrylate is first pre-dissolved in alcohol, then water is added to form a liquid binder. Add solvent, graphite powder, binder and suspending dispersant to this mixture, and then form nano decarburization prevention slurry after stirring evenly.

[0032] The prepared coating was uniformly sprayed on the surface of the 42CrMo sample to be heat treated at room temperature. Af...

Embodiment 2

[0034] The quality of each chemical composition of the anti-decarburization nano-coating is as shown in Table 2:

[0035] Table 2 Embodiment 2 coating composition distribution ratio

[0036]

[0037] Weigh Al(NO 3 ) 3 and NH 4 HCO 3 were dissolved in deionized water to form saturated solutions. Add diatomaceous earth to NH 4 HCO 3 Stir the solution into a suspension, and slowly add Al(NO 3 ) 3 solution for a precipitation reaction. Filter and wash the resulting precipitate and heat it at 200-300°C for 30 minutes to obtain nano-Al 2 o 3 and diatomaceous earth mixture. Sodium polyacrylate is first pre-dissolved in alcohol, then water is added to form a liquid binder. Add solvent, graphite powder, binder and suspending dispersant to this mixture, and then form nano decarburization prevention slurry after stirring evenly.

[0038]The prepared coating was evenly sprayed on the surface of the 30CrMoA sample to be heat treated at room temperature. After the workpiece...

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Abstract

The invention provides an anti-shedding carbon nano paint and a preparation method thereof. The paint is composed of the following components in percentage by weight: 5 to 20 wt% of nano Al2O3, 50 to 80 wt% of diatomite, 2 to 10 wt% of graphite powder, 5 to 20 wt% of binder, 1 to 3 wt% of suspended dispersing agent, and the balance being solvent and impurities. The preparation method comprises the following steps: preparing an Al(NO3)3 water solution and a NH4HCO3 water solution from Al(NO3)3 and NH4HCO3 respectively; adding the Al(NO3)3 water solution into turbid liquid of diatomite and NH4HCO3, filtering and washing generated Al(OH)3 precipitate to obtain a mixture of nano Al(OH)3 and diatomite; heating to dehydrate the mixture to form nano Al2O3; adding a solvent, graphite powder, binder and a suspended dispersing agent into the mixture of nano Al2O3 and diatomite, and evenly mixing to obtain the nano level anti-shedding carbon slurry. The provided paint has the advantages that the size of nano particles is uniform, the size is small, the dispersibility is good, the cost is low, the preparation and painting technologies are simple and feasible, the natural peeling ability is strong, the high temperature oxidation and decarbonization of steel plate can be effectively avoided, and the paint is suitable for precision machining of metal workpiece with complicated shapes.

Description

technical field [0001] The invention belongs to the field of metal surface treatment materials, and in particular relates to a nano-coating for preventing metal workpieces from being oxidized and decarburized at high temperature in an oxidizing atmosphere and a preparation method thereof. Background technique [0002] High-temperature heating of metal materials is a common processing method. For example, material heat treatment is to change the internal structure of the metal, eliminate material defects, and refine the crystal grains by heating, insulating and cooling the metal to produce a solid-state phase transition. Finally, the purpose of prolonging the service life of metal parts, environmental protection and energy saving is realized. When heated at high temperature, if the carbon element on the metal surface comes into contact with an oxidizing atmosphere, it will cause oxidation and decarburization. And the decarburization phenomenon is further aggravated with the...

Claims

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Application Information

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IPC IPC(8): C09D133/02C09D171/00C09D7/12
Inventor 张宇徐承明刘仁东王永明王旭王科强吕东
Owner ANGANG STEEL CO LTD
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