Method for preventing corrosion and marine creature fouling on ship propeller

A technology of propellers and marine organisms, applied in chemical instruments and methods, hulls, ship construction, etc., can solve the problems of easy damage of organic paint coatings, short service life, and inability to provide long-term effective protection, and achieve the goal of solving the problems of marine organisms Fouling, low porosity, and the effect of solving propeller corrosion

Inactive Publication Date: 2012-02-01
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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AI Technical Summary

Problems solved by technology

Some people have applied organic anti-corrosion coating and anti-fouling paint on the surface of the propeller to solve the corrosion and fouling problems of the propeller, but the organic paint coating is easy to damage, the service life is short, and it cannot provide long-term effective protection

Method used

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  • Method for preventing corrosion and marine creature fouling on ship propeller

Examples

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Embodiment 1

[0011] Using high manganese aluminum bronze (ZQA112-8-3-2) for propellers as the base material, sandblasting the surface of the base before spraying to remove scale and obtain a uniform and rough surface, and then adopt thermal spraying methods such as plasma spraying methods to prepare sequentially Bond coats, metal oxide ceramic insulating coatings and metal antifouling coatings on surfaces.

[0012] Preparation of bonding coating: self-bonding aluminum bronze powder is used, the powder particle size is 40-104 μm, and the weight percentage of main components is: Al: 10.4%; Fe: 0.52%; Cu: balance. Prepared by plasma spraying, the coating thickness is about 60μm.

[0013] Metal oxide ceramic insulating coating: Spray two ceramic insulating coatings on the bonding coating, one material is Al 2 o 3 -13%TiO 2 (Sample 1), the percentage by weight of coating powder composition is: TiO 2 : 13.2%; SiO 2 : O.5%; Al 2 o 3 : The balance, the powder particle size is 20-40μm; the o...

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Abstract

The invention relates to a method for preventing corrosion and marine creature fouling on a ship propeller. Cathode protection, a ceramic insulating coating and a metallic antifouling coating are organically combined in the method. The method comprises the following steps of: removing scales on the surface of the copper alloy propeller, obtaining a uniform and rough surface, and spraying a metallic adhesive coating by adopting a thermal spraying method; preparing a metallic oxide ceramic insulating coating on the surface of the adhesive coating by adopting the thermal spraying method, wherein the ceramic insulating coating comprises single-component oxides such as Al2O3, Cr2O3 and the like and multi-component composite powder of TiO2 or SiO2 with low melting point; preparing the metallic antifouling coating on the ceramic insulating coating, wherein the metallic antifouling coating is made of pure copper or copper alloy with antifouling function; and meanwhile, performing cathode protection on the propeller. The ceramic and the metallic coating adopted in the method have higher bonding force and longer protection life, the current requirement of the ship cathode protection is reduced, the corrosion and marine creature fouling problems of the ship propeller can be simultaneously solved, and the ceramic and the metallic coating have obvious corrosion resistance and antifouling effect.

Description

Technical field: [0001] The invention relates to a method for preventing ship propeller corrosion and marine biofouling. The method is suitable for preventing the corrosion of ship propellers and the fouling and adhesion of marine organisms on the surface of the propellers. It belongs to the technical field of marine corrosion and protection. Background technique: [0002] Seawater is a very corrosive medium. Ship propellers are usually made of copper alloy materials. In addition to being electrochemically corroded by seawater, they will also be damaged by seawater erosion corrosion and cavitation corrosion during work, causing surface damage and shortening their service life. At the same time, the surface of the propeller is also prone to marine biofouling in seawater. Biofouling will affect the propulsion efficiency of the propeller and increase the noise of the propeller underwater. Sometimes fouling organisms will also lead to accelerated corrosion of the copper alloy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B59/04C23C4/10C23F13/06B32B15/04B32B15/18B32B18/00C23C4/08C23C4/11
Inventor 许立坤李相波辛永磊李守彪
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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