Large power electric arc hot spray coating method of zinc aluminium false alloy

An arc spraying and pseudo-alloy technology, applied in metal material coating process, coating, melt spraying and other directions, can solve the problems of short anti-corrosion life, thick single wire coating thickness, and poor spray gun atomization. Achieve cost savings, save zinc and aluminum consumption

Inactive Publication Date: 2007-01-31
SHANGHAI RUNXIN CHEM ENG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] First, the wire material used is currently limited to two wires of the same material (such as zinc, aluminum, stainless steel, aluminum bronze, etc.) for thermal spraying, and cannot form a strong corrosion-resistant composite pseudo-alloy on the surface of the workpiece Coating, so in order to meet the anti-corrosion requirements, the thickness of the single-wire coating is generally thic

Method used

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Embodiment Construction

[0014] Below in conjunction with specific embodiment the present invention is described in further detail:

[0015] arc spraying

[0016] (1) Raw material requirements

[0017] The aluminum wire material used in arc spraying aluminum requires that the purity of zinc is greater than 99.99%, the total content of impurities is not more than 0.01%, the purity of aluminum is greater than 99.5%, and the total content of impurities is controlled not higher than 0.5%. The corrosion rate of the layer increases, and the corrosion resistance decreases greatly, which affects the anti-corrosion effect.

[0018] (2) Environmental requirements for arc spraying

[0019] Arc spraying should be carried out in an environment with a relative humidity of less than 85%, and arc spraying should be carried out within 6 hours after sandblasting. As the relative humidity increases, the interval between grit blasting and arc spraying should be further reduced.

[0020] (3) Arc spraying process contr...

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Abstract

This invention relates to a process of high-power electric arc thermal spraying of zinc and aluminium alloy. The process includes : first apply sand blasting on the work surface in order to remove the oxide and scale; then use the selected equipment which made up by high-power electric arc spraying coater spraying coater, air pump, and air-cooling machine to compose the thermal spraying system, use zinc and aluminium wire as strike arc to spray on the work surface; the third step is using suitable sealing-hole agent to sealing the hole on the surface of smear layer; at last use the suitable paint for hull painting of surface. This invention has no harsh requisition of purity on material, and reduces pollution.

Description

technical field [0001] The invention relates to a spraying method, in particular to a high-power arc zinc-aluminum pseudo-alloy thermal spraying method. Background technique [0002] The high-power arc thermal spraying method is to use high-power arc thermal spraying equipment to generate electric arcs between metal wires. After the metal wires are melted at high temperature, they are atomized by high-speed airflow, and the atomized particles are sprayed onto the surface of the substrate at a high speed. Technology, after spraying, the surface of the substrate has long-term anti-corrosion performance. [0003] Compared with other thermal spraying methods, arc spraying has outstanding advantages such as high work efficiency, good coating quality, low cost of use, easy operation, and low equipment price. It is unique in solving problems such as wear resistance, corrosion resistance at room temperature and high temperature corrosion, so this technology will have a potential ma...

Claims

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Application Information

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IPC IPC(8): C23C4/06C23C4/18B24C1/08C23C4/08C23C4/131
Inventor 张政权
Owner SHANGHAI RUNXIN CHEM ENG TECH DEV
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