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High-performance arc spraying Zn-Al powder core wire and preparation method thereof

A technology of arc spraying and powder core wire, which is applied in the direction of coating, fusion spraying, metal material coating process, etc., can solve the problems of insufficient marine climate corrosion resistance and mechanical properties, and achieve the improvement of mechanical properties and barriers Effect of dislocation movement and porosity improvement

Inactive Publication Date: 2012-12-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-performance arc sprayed Zn-Al powder core wire material and its preparation method for the existing arc sprayed zinc-aluminum coating with insufficient marine weather corrosion resistance and mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The outer cladding is made of Zn-Al alloy strip with a width of 16mm and a thickness of 0.8mm, and the powder core filling rate is 5%. The composition of powder core and percentage by weight thereof are as follows:

[0026] Component Weight percent (%)

[0027] Nano-Al 2 o 3 Powder 70

[0028] Nano-TiO 2 Powder 20

[0029] Nano Y 2 o 3 Powder 10

[0030] Powder core wire diameter is 2mm

[0031] The powder core wire made according to the above specifications is arc sprayed on the Q235 steel workpiece to form a spray coating with the following characteristic effects:

[0032] 1. SEM observation combined with Image-Pro Plus image analysis software tests that the porosity of the coating is only 0.042%, which is far lower than that of non-nano zinc-aluminum coatings (1%~5.0%).

[0033] 2. The zinc-aluminum nanocomposite coating has a hardness of 380HV measured by a Vickers hardness tester, which is 58.33% higher than that of the non-nanometer zinc-aluminum coating...

Embodiment 2

[0036] The outer cladding is made of Zn-Al alloy strip with a width of 16mm and a thickness of 0.8mm, and the powder core filling rate is 5%. The composition of powder core and percentage by weight thereof are as follows:

[0037] Component Weight percent (%)

[0038] Nano-Al 2 o 3 Powder 65

[0039] Nano-TiO 2 Powder, 15

[0040] Nano Y 2 o 3 Powder 20

[0041] Powder core wire diameter is 2mm

[0042]The powder core wire made according to the above specifications is arc sprayed on the Q235 steel workpiece to form a spray coating with the following characteristic effects:

[0043] 1. SEM observation combined with Image-Pro Plus image analysis software to test the porosity of the coating is only 0.030%, which is far lower than the porosity of non-nano zinc-aluminum coatings (0.1%~5.0%).

[0044] 2. The Vickers hardness of the zinc-aluminum nanocomposite coating is 400HV, which is 66.67% higher than that of the non-nanometer zinc-aluminum coating (240HV).

[0045] ...

Embodiment 3

[0048] The outer cladding is made of Zn-Al alloy strip with a width of 16mm and a thickness of 0.8mm, and the powder core filling rate is 5%. The composition of powder core and percentage by weight thereof are as follows:

[0049] Component Weight percent (%)

[0050] Nano-Al 2 o 3 Powder 60

[0051] Nano-TiO 2 Powder, 20

[0052] Nano Y 2 o 3 Powder 20

[0053] Powder core wire diameter is 2mm

[0054] The powder core wire made according to the above specifications is arc sprayed on the Q235 steel workpiece to form a spray coating with the following characteristic effects:

[0055] 1. SEM observation combined with Image-Pro Plus image analysis software to test the porosity of the coating is only 0.032%, which is far lower than the porosity of non-nano zinc-aluminum coatings (0.1%~5.0%).

[0056] 2. The Vickers hardness of the zinc-aluminum nanocomposite coating is 410HV, which is 70.83% higher than that of the non-nanometer zinc-aluminum coating (240 HV).

[0057] ...

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Abstract

The invention discloses a high-performance arc spraying Zn-Al powder core wire and a preparation method thereof, belonging to the technical field of metal surface protection. The wire is mainly composed of an outer cladding and a powder core, wherein the outer cladding is a Zn-Al alloy strip; the powder core is mainly composed of the following components in percentage by weight: 60-70% of nano Al2O3 powder, 10-20% of nano TiO2 powder and the balance of nano Y2O3 powder; and the nano powder core accounts for 5-20% of the total weight of the wire. The novel Zn-Al nano powder core wire can be prepared into a Zn-Al nano composite coating through an arc spraying method; and the ocean climate corrosion resistance and the hardness of the coating are far higher than those of the common arc spraying Zn-Al coating.

Description

technical field [0001] The invention belongs to the technical field of metal surface protection, and in particular relates to a high-performance arc sprayed Zn-Al powder core wire material and a preparation method thereof. Background technique [0002] Arc spraying Zn-Al coating is an important protection method for steel parts in China against marine climate corrosion. Development brings heavy losses. The cost of anti-corrosion maintenance of Chinese naval ships is as high as about 10 billion yuan per year, and accidents of ships losing combat performance due to corrosion and delaying fighter jets have also occurred. For example: the upper shell of a submarine loses its strength due to severe corrosion, causing the steel plate to break; a boat docked at Zhoushan Wharf sank at the wharf due to stray current corrosion; , the corrosion was so severe that it could not be started; the bottom plate of a newly built ship was corroded and leaked in less than a year. Other armame...

Claims

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Application Information

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IPC IPC(8): C23C4/06C23C4/12C23C4/131
Inventor 姚正军周文斌魏东博周金堂李婷朱俊谋罗西希
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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