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

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...

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 thicker, the anti-corrosion period is shorter, and the requirements for the purity of the substrate surface are relatively strict;

[0006] Second, the current arc spraying equipment used has low power, low efficiency, poor atomization degree of the spray gun, and insufficient wire feeding force, so it is not suitable for on-site construction operations requiring large-area and long-distance wire feeding