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Easily degreased coated steel plate, preparation method thereof and painted steel plate

A technology of coating steel plate and coating, applied in coating, hot dipping process, solid diffusion coating, etc., can solve problems such as ineffective degreasing

Pending Publication Date: 2022-02-18
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The application provides an easy degreasing coated steel plate and its preparation method and application to solve the technical problem that the zinc-aluminum-magnesium coated steel plate cannot be effectively degreased in the prior art

Method used

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  • Easily degreased coated steel plate, preparation method thereof and painted steel plate
  • Easily degreased coated steel plate, preparation method thereof and painted steel plate
  • Easily degreased coated steel plate, preparation method thereof and painted steel plate

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preparation example Construction

[0034] Such as figure 2 , In one embodiment of the present application, there is provided an easy method for preparing defatted plated steel sheet, the method comprising:

[0035] . S1 obtain a bath containing the chemical composition of the magnesium aluminum coating and preheated to afford preheating bath;

[0036] As an alternative embodiment, the preheating temperature of the bath was 400 ℃ -500 ℃, the preheating temperature of the steel substrate of 400 ℃ -500 ℃;

[0037]In the present application, it is an object of controlling the temperature of 400 ° C to 500 ° C in the preheating plating solution to prevent too low of the plating solution; when the temperature range is too large, since the steel sheet is at a higher temperature. In the plating solution, the Fe element in the steel sheet will quickly react rapidly in the plating solution, forming a coarse-containing compound particulate matter containing Si and Mg, and deteriorating the toughness of the plating layer, resu...

Embodiment 1

[0048] The chemical composition of zinc aluminum magnesium plating is: mg: 1%, Al: 1%, margin is Zn and inevitable impurity elements;

[0049] The porosity of the porous oxide film is 20%, and the hole depth accounts for 100% of the thickness of the porous oxide film layer. The thickness of the porous oxide film is 100 nm, and the aperture depth is 100 nm;

[0050] The mass fraction of oxygen in the oxidative atmosphere is 0.3%, and the heating temperature in the controlled oxidizing atmosphere is 100 ° C, and the heating time is 10 s in the oxidizing atmosphere;

[0051] The preheating plating solution has a temperature of 480 ° C, and the temperature of the preheating steel matrix is ​​480 ° C.

Embodiment 2

[0053] The chemical ingredient of zinc aluminum magnesium plating is: mg: 1.2%, Al: 2%, margin is Zn and inevitable impurity elements;

[0054] The porosity of the porous oxide film is 25%, the hole depth accounts for 97% of the thickness of the porous oxide film layer, and the thickness of the porous oxide film is 100 nm, and the aperture depth is 97 nm;

[0055] The mass fraction of oxygen in the oxidation atmosphere is 0.8%, and the heating temperature in the oxidizing atmosphere is 120 ° C, and the heating time is 20 s in the oxidizing atmosphere;

[0056] The temperature of the preheating plating solution was 400 ° C, and the temperature of the preheating steel matrix was 430 ° C.

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Abstract

The invention belongs to the technical field of steel hot dipping treatment, and particularly relates to an easily degreased coated steel sheet, a preparation method thereof and the application thereof.The coated steel sheet comprises a steel substrate and a coating, the coating comprises a zinc-aluminum-magnesium coating and a porous oxidation film, the innermost layer of the coating is the zinc-aluminum-magnesium coating, and the outermost layer of the coating is the porous oxidation film layer; the porous oxidation film layer is an oxidation film layer of the zinc-aluminum-magnesium coating; the method comprises the steps that a plating solution containing chemical components of the zinc-magnesium-aluminum coating is obtained and preheated, and a preheated plating solution is obtained; a preheated steel base body is obtained; the preheated steel base body is placed in the preheated plating solution to be subjected to hot dipping treatment, and a first steel plate is obtained; the first steel plate is heated in an oxidizing atmosphere and then cooled to the room temperature, and a plated steel plate is obtained; according to the application, the coated steel plate is applied to production of vehicle parts and household appliances needing to be painted. By controlling the components of the zinc-aluminum-magnesium coating and the process conditions of the oxidizing atmosphere, the coated steel plate with good degreasing effect and high corrosion resistance can be obtained.

Description

Technical field [0001] The present application belongs to hot-dip steel processing technology, and in particular relates to an easily skimmed plated steel sheet and painted steel and its preparation method. Background technique [0002] Zinc hot dipping treatment is molten zinc and alloys steel substrate reaction, thereby forming a strong metallurgical bonding coating; Zinc hot dip coating steel, having a strong bonding force, good corrosion resistance, a long life is simple, the manufacturing process, the product low price, demand in many different industries such as the automotive industry, electrical industry and the construction industry is increasing. [0003] The most commonly used hot-dip zinc plating process of aluminum-magnesium plated zinc, magnesium, and zinc-magnesium and aluminum-plated surface is easy to form a dense oxide film fine air environment, very polar polarity oxide thin film adsorbable oil molecules, difficult to remove, remove the skim coated steel diffic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/26C23C2/40C23C8/10C22C18/00C22C18/04
CPCC23C2/06C23C2/40C23C2/26C23C8/10C22C18/04C22C18/00
Inventor 蒋光锐刘广会李研王海全商婷滕华湘
Owner SHOUGANG CORPORATION
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