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Znalmgtisib anti-corrosion coating for steel structure and preparation method thereof

A technology of anti-corrosion coating and steel structure, applied in the direction of coating, metal material coating technology, fusion spraying, etc., can solve the problem of high cost of anti-corrosion coating raw materials, unsuitable promotion and use, and increase in cost of anti-corrosion coating materials and processes and other problems, to achieve the effect of reducing coating consumption, strengthening cathodic protection, and enhancing isolation protection

Active Publication Date: 2021-02-23
SINOADDITIVE MFG EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of rare earth elements leads to high cost of raw materials for anti-corrosion coatings, and the spraying of organic sealing coatings leads to a significant increase in the cost of materials and processes for anti-corrosion coatings, both of which are not suitable for popularization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The ZnAlMgTiSiB anti-corrosion coating for steel structures in this embodiment is composed of the following components in mass percentage: Zn 73%, Al 15%, Mg 2%, Ti 5%, Si 3%, B 2%.

[0023] The preparation method of ZnAlMgTiSiB anticorrosion coating for steel structure of this embodiment comprises the following steps:

[0024] Step 1. Pretreat the surface of the steel structure to Sa2.5 by high-pressure water blasting;

[0025] Step 2, using the arc spraying method to spray the ZnAlMgTiSiB wire material to the steel structure surface after the pretreatment in step 1 to form a ZnAlMgTiSiB anti-corrosion coating; 60 °, the arc voltage is 40V, the arc current is 600A, the conveying speed of the ZnAlMgTiSiB wire is 5m / min, the pressure of the compressed air is 0.9MPa; the thickness of the ZnAlMgTiSiB anti-corrosion coating is 100 μm.

[0026] After testing, the density of the ZnAlMgTiSiB anti-corrosion coating prepared in this example is 99.92%, and the microhardness is 4...

Embodiment 2

[0029] The ZnAlMgTiSiB anti-corrosion coating for steel structures in this embodiment consists of the following components in mass percentage: Zn 41%, Al 55%, Mg 1%, Ti 1.3%, Si 0.7%, B 1%.

[0030] The preparation method of ZnAlMgTiSiB anticorrosion coating for steel structure of this embodiment comprises the following steps:

[0031] Step 1. Pretreat the surface of the steel structure to Sa2.5 by sandblasting;

[0032] Step 2. Spray the ZnAlMgTiSiB powder core wire material composed of ZnAl-coated AlMgTiSiB powder to the surface of the steel structure after pretreatment in step 1 by arc spraying to form a ZnAlMgTiSiB anti-corrosion coating; the spray gun used in the arc spraying method and the surface of the steel structure The distance is 100mm, the spraying angle of the spray gun is 90 °, the arc voltage is 20V, and the arc current is 200A, the conveying speed of the ZnAlMgTiSiB powder core wire material is 0.5m / min, and the pressure of the compressed air is 0.4MPa; The t...

Embodiment 3

[0036] The ZnAlMgTiSiB anti-corrosion coating for steel structures in this embodiment consists of the following components in mass percent: Zn57.6%, Al38%, Mg0.5%, Ti0.5%, Si1.9%, B1.5%.

[0037] The preparation method of ZnAlMgTiSiB anticorrosion coating for steel structure of this embodiment comprises the following steps:

[0038] Step 1. Pretreat the surface of the steel structure to Sa2.5 by high-pressure water blasting;

[0039] Step 2. Spray the ZnAlMgTiSiB powder core wire material composed of ZnAlMg wire coated with AlMgTiSiB powder to the surface of the steel structure after pretreatment in step 1 by arc spraying method to form a ZnAlMgTiSiB anti-corrosion coating; the spray gun and steel structure used in the arc spraying method The surface distance is 100mm, the spraying angle of the spray gun is 75°, the arc voltage is 30V, the arc current is 400A, the conveying speed of the ZnAlMgTiSiB powder core wire material is 2.8m / min, and the pressure of the compressed air i...

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Abstract

The invention discloses a ZnAlMgTiSiB anti-corrosion coating for steel structure, which is composed of the following components in mass percentage: Zn 41%-73%, Al 15%-55%, Mg 0.5%-2%, Ti 0.5%-5%, Si 0.7% to 3%, B 1% to 2%. The corrosion products of Ti, Si and B in the ZnAlMgTiSiB anti-corrosion coating of the invention are insoluble in water, which reduces the coating corrosion rate and improves the anti-corrosion life of the steel structure. The invention also discloses a method for preparing a ZnAlMgTiSiB anti-corrosion coating for steel structures, the method comprising: 1. pretreating the surface of the steel structure to a level above Sa2.5; The surface of the steel structure after treatment forms a ZnAlMgTiSiB coating. The method of the invention reduces the pores in the coating and improves the bonding strength between the coating and the steel structure.

Description

technical field [0001] The invention belongs to the technical field of steel structure anticorrosion, and in particular relates to a ZnAlMgTiSiB anticorrosion coating for steel structures and a preparation method thereof. Background technique [0002] Zn has the advantage of electrochemical activity, can provide effective cathodic protection for steel substrates, and has the effect of isolation and protection against corrosive media, but its corrosion products dissolve in water, resulting in a higher corrosion rate of Zn coatings and faster coating consumption. . Al coating is easy to form dense Al in the atmosphere 2 o 3 The thin film has a good passivation protection effect, and the corrosion products are insoluble in water, which greatly reduces the corrosion rate. Therefore, ZnAl alloy is the most commonly used anticorrosion coating material for steel structures. [0003] The alloy coating prepared by arc spraying method avoids the pollution of hot-dip plating, is su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/08C23C4/131C22C18/04C22C21/10C22C30/06
CPCC22C18/04C22C21/10C22C30/06C23C4/08C23C4/131
Inventor 华云峰
Owner SINOADDITIVE MFG EQUIP CO LTD
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