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Stainless steel high temperature oxidation resistance paint and application thereof

A high-temperature anti-oxidation, stainless steel technology, applied in the direction of anti-corrosion coatings, coatings, devices for coating liquid on the surface, etc., can solve the problems of inconformity with the application site hot delivery process, complex production process, and inability to high-temperature coating, etc., to achieve The economic and social benefits are considerable, the preparation process is simple, and the effect of reducing energy consumption

Inactive Publication Date: 2008-09-17
SHANXI XIHUI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention solves the complex production process, high cost consumption and low protection temperature of existing high-temperature anti-oxidation coatings used in the heat treatment process of stainless steel billets, especially the inability to apply high-temperature coatings during the application process, and does not meet the requirements of the hot delivery process on the application site and other problems, provide a stainless steel high temperature anti-oxidation coating and its application
Above-mentioned material is existing known product, those of ordinary skill in the art is easy to obtain

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: each serving is 1g

[0017] A high-temperature anti-oxidation coating for stainless steel, take 30g bentonite, grind it into 100-mesh powder, add 50g potassium water glass and 0.1g sodium carboxymethyl cellulose, mix and stir with 200g water to form a suspension coating, and its specific gravity is about is 1.1.

[0018] Apply the coating to the surface of 304 stainless steel billets at normal temperature to form a layer of off-white protective coating with a thickness of 50 μm. After heat treatment at 800 ° C for 10 hours, the oxidation loss rate of the substrate surface after coating protection is reduced by more than 96%, and The coating can be peeled off naturally, and the surface of the substrate is uniform and smooth without residue after peeling off.

Embodiment 2

[0019] Embodiment 2: every part is 1kg

[0020] A stainless steel high-temperature anti-oxidation coating, take 50kg of diatomite, grind it into a 500-mesh powder, add 70kg of sodium water glass and 1kg of polyvinyl alcohol, mix and stir it with 200kg of water to form a suspension coating with a specific gravity of 1.5.

[0021] Apply the coating to the surface of 316 stainless steel billets at 500°C to form a layer of off-white protective coating with a thickness of 300 μm. After heat treatment at 1250°C for 30 hours, the oxidation loss rate of the substrate surface after coating protection is reduced by more than 95%. And the coating can be peeled off naturally, and the surface of the substrate is uniform and smooth without residue after peeling off.

Embodiment 3

[0022] Embodiment 3: every part is 1t

[0023] A high-temperature anti-oxidation coating for stainless steel. Take 40t of sepiolite, grind it into a 400-mesh powder, add 60t of aluminum dihydrogen phosphate and 0.5t of polyacrylamide, mix and stir it with 200t of water to form a suspension coating, and its specific gravity is 1.3.

[0024] Apply the coating to the surface of 301 stainless steel billets at 400°C to form a layer of off-white protective coating with a thickness of 100 μm. After heat treatment at 1000°C for 20 hours, the oxidation loss rate of the substrate surface after coating protection is reduced by more than 94%. And the coating can be peeled off naturally, and the surface of the substrate is uniform and smooth without residue after peeling off.

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PUM

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Abstract

The invention relates to the technology field of an antioxidation coating, in particular to a stainless steel high-temperature oxidation-resistant coating and the application thereof, and solves the problems in the prior stainless steel oxidation-resistant coating such as complex production process, high cost, low protection temperature, narrow painting temperature range and so on. The stainless steel high temperature oxidation-resistant coating is prepared with organic powdered ore in an amount of 30 to 50 parts; an inorganic binder in an amount of 50 to 70 parts; a suspending agent in an amount of 0.1 to 1 part; and water in an amount of 200 parts. The stainless steel high temperature oxidation-resistant coating is applicable to oxidation protection / decarburization when semi-finished nickel chromium stainless steel products are heated for 0.5 to 30 hours at the temperature of 800 DEG C to 1500 DEG C, and is sprayed or coated on stainless steel surfaces within the range from room temperature to 500 DEG C. The coating thickness ranges from 50 Mu m to 300 Mu m. The coating formed at the high temperature forms a vitreous dense coating during high-temperature processing of a stainless steel basal body, and prevents oxygen from spreading on the surface of the stainless steel basal body, thus resisting oxidation, alleviating depletion and decarburization of microelements on stainless steel surfaces, and improving the rolling quality of the surface of the base body. The raw materials used for preparing the coating are cheap, and the coating is friendly to the environment. The preparation process is simple. The high-temperature oxidation and melting loss of various semi-finished nickel chromium stainless steel products is reduced by more than 90 percent, and the output and the yield of good plate blanks can be improved.

Description

technical field [0001] The invention relates to the technical field of anti-oxidation coatings, in particular to a stainless steel high-temperature anti-oxidation coating and its application. Background technique [0002] It is well known that before hot rolling, steel generally needs to go through a long heating process in a heating furnace at about 1250°C. Under the action of strong oxidizing and corrosive gases in the heating furnace, the oxidation and burning of the steel surface will be very serious. The rate is as high as 0.5% to 2.5%, which is manifested as: a layer of iron oxide scale will be formed on the surface of the steel coming out of the heating furnace. This layer of iron oxide scale must be peeled off from the steel surface. If no protective measures are taken, the iron oxide scale will be relatively thick and It is easy to leave residue on the surface of the substrate when peeling off. Generally, the general steel billet series, stainless steel billet seri...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D5/08B05D7/14
Inventor 李宏德李跃强
Owner SHANXI XIHUI TECH
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