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Continuous hot-dip aluminum-silicon-magnesium alloy steel plate, preparation method thereof and plating solution

A hot-dip aluminum and alloy steel plate technology, applied in the hot-dip plating process, metal material coating process, coating, etc., can solve the problems that limit the application and promotion of hot-dip aluminum steel plate, the cut surface does not have electrochemical protection, and hinder Aluminum to steel galvanic activation and other issues, to achieve the effect of improving the protection performance of the cut surface, the manufacturing process is simple and stable, and the manufacturing cost is low

Active Publication Date: 2018-11-13
华冠新型材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the formation of Al on the aluminum-coated steel sheet 2 o 3 The thin film hinders the galvanic activation of aluminum to steel, so that the cut surface after processing does not have electrochemical protection, resulting in a decrease in corrosion resistance, which greatly limits the application and promotion of hot-dip aluminized steel sheets in the construction field

Method used

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  • Continuous hot-dip aluminum-silicon-magnesium alloy steel plate, preparation method thereof and plating solution
  • Continuous hot-dip aluminum-silicon-magnesium alloy steel plate, preparation method thereof and plating solution
  • Continuous hot-dip aluminum-silicon-magnesium alloy steel plate, preparation method thereof and plating solution

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The continuous hot-dip aluminum-silicon-magnesium alloy steel plate is prepared by the following method:

[0052] 1. Bath preparation.

[0053] 1) Calculate the quantity of aluminum-silicon alloy ingots and aluminum-magnesium alloy ingots according to the predetermined alloy composition ratio and the weight of the required plating bath.

[0054] 2) Prepare tools such as mechanical agitator with adjustable speed, submersible hanging basket, flour slag fisher, safety mask, protective clothing and other safety equipment;

[0055] 3) Preheat the aluminum-silicon alloy ingot and other tools to be placed in the induction heating furnace (or called a plating tank) to above 200°C, then put the aluminum-silicon alloy ingot into the induction heating furnace to melt, and the melting heating temperature is : 650~700℃;

[0056] 4) After the above-mentioned aluminum-silicon alloy ingot is completely melted, put the aluminum-magnesium alloy ingot into the submerged hanging basket, ...

Embodiment 2

[0081] The alloy steel sheets with different aluminum-silicon-magnesium alloy components prepared in the above-mentioned embodiment 1 were sampled respectively, compared with the conventional aluminum-coated steel sheets (Al-10Si), respectively simulated in acidic environment, wet environment, and dry environment to test, and observe the cut-off It is time for the surface to start to produce red rust under the same environment.

[0082] The above-mentioned aluminum-coated steel sheet is prepared with reference to the method of Example 1, and the difference from the alloy steel sheet prepared in Example 1 is that the composition of the plating solution is different. The main components of the aluminum-coated steel sheet for comparison are: 10% Si and the balance of Al

[0083] 1. Placement experiment in humid environment.

[0084] Place the alloy steel plate above for 18 hours in a humid environment with a relative humidity greater than 80% (such as basement, rainy weather in s...

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Abstract

The invention discloses a continuous hot-dip aluminum-silicon-magnesium alloy steel plate, a preparation method thereof and a plating solution, and belongs to the technical field of steel band plate coating composite materials. The plating solution comprises the following components of, by weight, 8-10% of Si, 0.5-6% of Mg and the balance Al. By adopting the plating solution for preparing the hot-dip aluminum-silicon-magnesium alloy steel plate, the corrosion resistance of an aluminum plated steel plate can be remarkably improved, particularly the protective performance of a cut-off surface obtained after machining can be improved, and the continuous hot-dip aluminum-silicon-magnesium alloy steel plate is a first-choice building material used under severe environments such as marine climate and industrial districts. In addition, for the continuous hot-dip aluminum-silicon-magnesium alloy steel plate, the preparation method and the plating solution, the related manufacturing process issimple, the raw material source is convenient, the manufacturing cost is low, and the continuous hot-dip aluminum-silicon-magnesium alloy steel plate, the preparation method and the plating solution can be suitable for industrial mass production.

Description

technical field [0001] The invention relates to the technical field of coating composite materials for steel strips, in particular to a continuous hot-dip aluminum-silicon-magnesium alloy steel plate, a preparation method thereof, and a plating solution. Background technique [0002] Hot-dip aluminized steel sheets are mainly used in industries requiring high heat resistance, such as electric heating appliances for household appliances, ovens, and automobile exhaust systems. However, with the maturity of stainless steel technology and the gradual reduction of processing costs, some products have been replaced by stainless steel. Compared with other coated steel sheets (such as galvanized, aluminum-zinc, etc.), aluminum-coated steel sheets have higher corrosion resistance and weather resistance; 2.5μm, while the corrosion amount of galvanized steel sheet is 15.2μm, and the corrosion amount of galvanized steel sheet is 7.6μm. However, due to the formation of Al on the aluminu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C23C2/40C22C21/02C22C1/02
CPCC22C1/026C22C21/02C23C2/12C23C2/40
Inventor 肖忠瑜郭明锋刘克勤郑东蓝俊
Owner 华冠新型材料股份有限公司
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