A kind of hot-dip galvanized aluminum-magnesium alloy coating and its preparation method and application

An aluminum-magnesium alloy, hot-dip galvanizing technology, applied in hot-dip plating process, metal material coating process, coating and other directions, to achieve the effect of reduced hot-dip plating temperature, controllable thickness and high adhesion

Active Publication Date: 2020-06-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem to be solved: In order to solve the problem of high strength and high corrosion resistance of bridge cable steel wire at the same time, the present invention provides a hot-dip galvanized aluminum-magnesium alloy coating and its preparation method and application

Method used

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  • A kind of hot-dip galvanized aluminum-magnesium alloy coating and its preparation method and application
  • A kind of hot-dip galvanized aluminum-magnesium alloy coating and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0018] A hot-dip galvanized aluminum-magnesium alloy coating for a bridge cable steel wire, comprising the steps of:

[0019] (1) Place the sample steel wire obtained after drawing at a temperature of 70°C and a mass concentration of 15% NaOH solution for degreasing treatment, and after washing with water, place it at a temperature of 70°C and a mass concentration of 15% HCl solution for removal Rust treated, blow dry.

[0020] (2) the sample steel wire of step (1) gained is placed in chemical composition mass fraction ratio and is ZnCl 2 :NH 4 Cl:SnCl 2 :KCl:Na 3 AlF 6 :CeCl 3 :H 2 In the fluxing solution of O=50:50:40:1:1:1:857, the fluxing time was 120s, and the fluxing temperature was 70°C.

[0021] (3) drying the sample obtained in step (2) at 100°C;

[0022] (4) Place the sample steel wire treated in step (3) in the zinc-aluminum-magnesium alloy solution whose chemical composition mass percentage is Zn:Al:Mg:Ce=98.49:1:0.5:0.01, dip-plating for 30s, The hot-dip ...

Embodiment 2

[0026] A hot-dip galvanized aluminum-magnesium alloy coating for a bridge cable steel wire, comprising the steps of:

[0027] (1) Place the sample steel wire obtained after drawing at a temperature of 70°C and a mass concentration of 15% NaOH solution for degreasing treatment, and after washing with water, place it at a temperature of 70°C and a mass concentration of 15% HCl solution for removal Rust treated, blow dry.

[0028] (2) the sample steel wire of step (1) gained is placed in chemical composition mass fraction ratio and is ZnCl 2 :NH 4 Cl:SnCl 2 :KCl:Na 3 AlF 6 :CeCl 3 :H 2 In the fluxing solution of O=100:95:80:15:10:5:695, the fluxing solution was 90s, and the fluxing temperature was 70°C.

[0029] (3) drying the sample obtained in step (2) at 100°C;

[0030] (4) Place the sample steel wire treated in step (3) in the zinc-aluminum-magnesium alloy solution whose chemical composition mass percentage is Zn:Al:Mg:Ce=93.3:5:1.5:0.2, dip-plating for 90s, The hot-...

Embodiment 3

[0034] A hot-dip galvanized aluminum-magnesium alloy coating for a bridge cable steel wire, comprising the steps of:

[0035] (1) Place the sample steel wire obtained after drawing at a temperature of 70°C and a mass concentration of 15% NaOH solution for degreasing treatment, and after washing with water, place it at a temperature of 70°C and a mass concentration of 15% HCl solution for removal Rust treated, blow dry.

[0036] (2) the sample steel wire of step (1) gained is placed in chemical composition mass fraction ratio and is ZnCl 2 :NH 4 Cl:SnCl 2 :KCl:Na 3 AlF 6 :CeCl 3 :H 2 In the fluxing solution of O=200:150:160:30:20:10:430, the fluxing temperature was 70° C. for 60 seconds.

[0037] (3) drying the sample obtained in step (2) at 100°C;

[0038] (4) Place the sample steel wire treated in step (3) in the zinc-aluminum-magnesium alloy solution whose chemical composition mass percentage is Zn:Al:Mg:Ce=86.5:10:3:0.5, dip-plating for 180s, The hot-dip temperatur...

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Abstract

The invention provides a hot-plating zinc-aluminum-magnesium alloy coating and a preparation method and application thereof. The coating is prepared from the following chemical components in percentage by mass: Zn:Al:Mg:RE=(86.50 to 98.49):(1 to 10):(0.5 to 3):(0.01 to 0.5), wherein RE is La, Ce or mixed rare earth. The hot-plating zinc-aluminum-magnesium alloy coating for a bridge cable steel wire is controllable in thickness, high in adhesion, is not prone to peeling off and is excellent in surface quality; a preparation technology is simple, plating omission is avoided, the hot plating temperature is significantly decreased (from the original 500 DEG C or above to 420 DEG C-480 DEG C), and the matrix steel wire strength loss is controlled within 50 MPa; and corrosion resistance is obviously better than that of a current zinc coating and a zinc-aluminum alloy coating, the demands of the complex environment on high comprehensive performance of the bridge cable steel wire are met, andwide market application prospects are achieved.

Description

technical field [0001] The invention belongs to the field of steel wire coatings and preparation methods thereof, and in particular relates to a hot-dip galvanized aluminum-magnesium alloy coating and its preparation method and application. Background technique [0002] With the increase of bridge span and the extension of service life, higher requirements are put forward for the strength and corrosion resistance of modern bridge cable wires. The production process of high-strength steel wire is: high-carbon pearlitic steel wire rod → pickling → phosphating → drawing → hot-dip plating → high-strength steel wire products. [0003] Traditionally, steel wires of bridge cables are treated with hot-dip galvanizing, which protects the substrate by sacrificial anodes. However, due to the high porosity of the zinc layer and the non-dense corrosion products, the protection of the coating on the steel wires has great limitations. Subsequently, the second generation of hot-dip galvani...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/06C23C2/38C23C2/02C22C18/00C22C18/04
CPCC22C18/00C22C18/04C23C2/02C23C2/06C23C2/38
Inventor 方峰蒋建清赵新委徐巍周立初周雪峰
Owner SOUTHEAST UNIV
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