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A kind of composite coating steel and preparation method thereof

A technology of composite coating and coated steel, applied in chemical instruments and methods, coatings, layered products, etc., can solve problems such as insufficient anti-corrosion performance, difficulty in meeting the requirements of high corrosion-resistant steel, and damage to the steel plate substrate. The effects of high coating resistance to peeling strength, low coating surface defect rate, and excellent corrosion resistance

Active Publication Date: 2021-03-19
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the coated steel has anti-corrosion performance, there are the following technical problems in practical application: (1) the anti-corrosion performance is insufficient, and it is difficult to meet the requirements of high corrosion-resistant steel; (2) due to surface defects of the steel plate substrate, or the coating process will The steel substrate is damaged, which has a serious impact on the surface quality of the coating; (3) The coating and the steel substrate are easy to peel off

Method used

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  • A kind of composite coating steel and preparation method thereof
  • A kind of composite coating steel and preparation method thereof
  • A kind of composite coating steel and preparation method thereof

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preparation example Construction

[0039] Based on the same inventive concept, the application also provides a preparation method of composite coated steel, said method comprising:

[0040] surface-treating the steel substrate;

[0041] Coating an intermediate layer containing the components on the upper surface of the surface-treated steel substrate to obtain steel containing the intermediate layer;

[0042] coating the upper surface of the intermediate layer containing the intermediate layer steel to obtain composite coated steel.

[0043] In the present application, the coating method is hot-dip coating, and the hot-dip coating temperature is 400-700°C.

[0044] In the present application, the surface treatment includes at least one of the following: removing iron from the surface and removing scale from the surface.

[0045] The thickness of the intermediate layer of the composite coated steel provided in the embodiment of the present invention is 10-200 nanometers. The role of the intermediate layer is ...

Embodiment 1

[0051] This embodiment provides a composite coated steel, the coated steel includes a steel base, an intermediate layer and a coating, the intermediate layer is located between the steel base and the coating.

[0052] Specifically, the intermediate layer is nickel.

[0053] Specifically, the number of layers of the middle layer is 1.

[0054] Specifically, the thickness of the intermediate layer is 200nm

[0055] Specifically, the coating is a galvanized layer.

[0056] Specifically, the total thickness of the coating is 10um.

[0057] Specifically, the steel matrix is ​​hot-rolled pickled steel.

[0058] Specifically, by weight percentage, the chemical composition of the steel matrix is ​​as follows: 0.2% C, 0.2% Si, 1.2% Mn, 0.01% S, 0.01% P, 0.08% Al, and the rest are Fe and unavoidable impurity elements .

[0059] Specifically, the steel matrix has a thickness of 1.50mm and a width of 1200mm.

[0060] Based on the same inventive concept, embodiments of the present in...

Embodiment 2

[0065] This embodiment provides a composite coated steel, the coated steel includes a steel base, an intermediate layer and a coating, the intermediate layer is located between the steel base and the coating.

[0066] Specifically, the material of the intermediate layer is nickel-cobalt and nickel-copper alloy, the weight percentage of nickel in the nickel-cobalt alloy is 50%, and the weight percentage of nickel in the nickel-copper alloy is 20%.

[0067] Specifically, the number of layers of the middle layer is 2.

[0068] Specifically, the thickness of the intermediate layer is 10nm

[0069] Specifically, the coating is a galvanized aluminum layer.

[0070] Specifically, the total thickness of the coating is 100um.

[0071] Specifically, the steel matrix is ​​cold-rolled steel.

[0072] Specifically, by weight percentage, the chemical composition of the steel matrix is ​​as follows: 0.02% C, 0.05% Si, 2% Mn, 0.05% S, 0.02% P, 0.6% Al, and the rest are Fe and unavoidable i...

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Abstract

The invention relates to a composite coated steel and a preparation method thereof, which belong to the field of coating technology. The embodiment of the invention provides a composite coated steel, which is characterized in that the coated steel includes a steel matrix, an intermediate layer and a coating, and the The intermediate layer is located between the steel substrate and the coating, the composition of the intermediate layer includes an alloy, and the alloy includes at least one of the following: nickel alloy, copper alloy, tin alloy, and the thickness of the intermediate layer is 10- 200nm; the composition of the intermediate layer also includes a mixture of the alloy and particles, and the particles include at least one of the following: TiC, SiC; the composite coated steel provided by the present invention has the following effects at the same time: it has excellent corrosion resistance , The coating surface defect rate is low, and the coating anti-stripping strength is high.

Description

technical field [0001] The invention belongs to the technical field of coating, and in particular relates to a composite coated steel and a preparation method thereof. Background technique [0002] Coated steel refers to steel coated with an anti-corrosion coating on the surface of the steel substrate, including galvanized steel, galvanized aluminum steel, aluminized silicon steel, etc. [0003] Although the coated steel has anti-corrosion performance, there are the following technical problems in practical application: (1) the anti-corrosion performance is insufficient, and it is difficult to meet the requirements of high corrosion-resistant steel; (2) due to surface defects of the steel plate substrate, or the coating process will The steel plate substrate is damaged, which has a serious impact on the surface quality of the coating; (3) the coating and the steel substrate are easy to peel off. Contents of the invention [0004] In view of the above problems, the present...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/60C22C38/06C23C30/00B32B15/01B32B15/18B32B15/20B32B33/00
CPCC22C38/004C22C38/02C22C38/04C22C38/60C22C38/002C22C38/06B32B15/013C23C30/00B32B15/015B32B15/012B32B15/20B32B33/00B32B2307/714C23C28/027C23C28/025C23C28/023C23C2/06C23C2/12
Inventor 蒋光锐滕华湘章军朱国森刘李斌韩赟李飞胡燕慧白雪徐德超李研尉冬
Owner SHOUGANG CORPORATION
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