High-power arc spraying zinc aluminum pseudo-alloy protecting film and spraying method thereof

Abstract

The invention relates to a zinc-aluminum pseudo-alloy protecting film of steel member anti-corrosion products and a spraying method thereof, in particular to a high-power arc-spray zinc-aluminum pseudo-alloy protecting film mainly applicable to the anti-corrosion products, such as, bridge steel structures, offshore platforms and other offshore steel structures and the spraying method thereof. The equipment of the invention comprises a high-power spraying power source, a refrigerated air dryer, a high-power arc-spray machine and a secondary atomized spray nozzle, which produces the zinc-aluminum pseudo-alloy protecting film. The method of the invention adopts zinc and aluminum metal lines for arc to spray the pseudo alloy protecting film on a workpiece or a steel surface; the method mainly solves the technical problem of how to obtain premium protecting films by adjusting equipment and technology process, etc. The invention has the beneficial effects that: the aluminum content in the zinc-aluminum pseudo-alloy protecting film is improved, the performance of the protecting film is enhanced, and the service lifetime of the steel structures is prolonged, thereby having the advantages of reducing cost and improving efficiency.

Description

technical field [0001] The invention relates to a zinc-aluminum pseudo-alloy protective film and a spraying method for the protective film of steel component anticorrosion products, especially to a kind of steel structure mainly applicable to other marine steel structures such as bridge steel structures, ships, docks, oil storage tanks and offshore platforms. It is a new product that prolongs the service life of steel components and a spraying method of zinc-aluminum pseudo-alloy protective film. Background technique [0002] There are many spraying anti-corrosion methods currently used, such as spraying pure zinc, spraying pure aluminum, spraying zinc first and then spraying aluminum, and spraying zinc-aluminum alloy, etc., all of which are suitable for corrosion protection of steel components. But these have their own shortcomings, such as: [0003] Spraying pure zinc: When spraying pure zinc coating, a large amount of ZnOn odor and dust mist will be generated, so it is e...

AI Technical Summary

Problems solved by technology

Generally, the thickness of single wire spraying is thicker, the anti-corrosion period is shorter, and the requirements for the surface treatment of the substrate are more stringent;

[0011] Second, the arc spraying equipment used has low power and low working efficiency. When the thickness of the coating is 100μm, the current efficiency is only 5-8m 2 ;

[0012] Third, the structure of the spraying equipment used is different, and the degree of atomization of the spray gun is poor; factors such as insufficient wire feeding force are not suitable for the on-site construction requirements of large-area and long-distance wire feeding

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