Composite coating capable of preventing marine biofouling and spraying method thereof

Abstract

The invention relates to a composite coating capable of preventing marine biofouling and a spraying method thereof. The high velocity oxygen fuel spraying and cold spraying technologies are adopted to prepare a transition layer, an insulated coating and an antifouling coating on a metal substrate and achieve the aims of anticorrosion and anifouling. The spraying method comprises the following main steps: (1) pretreating the surface of the metal substrate; (2) performing high velocity oxygen fuel spraying; and (3) performing cold spraying. The method is adopted to prepare an insulated ceramic coating and a pure copper coating on the surface of the metal substrate so that the anticorrosion and anifouling of the two coatings are combined organically and the high-performance composite coating can be formed. The method adopts high velocity oxygen fuel spraying, higher binding force exists between the prepared transition layer and insulated layer and the substrate; when cold spraying is adopted, red copper can not be oxidized and the anifouling effect of red copper can be ensured; and the transition layer, insulated layer and antifouling functional layer of the composite coating are designed, thus electrical insulation is realized between the antifouling functional layer and the metal substrate and the antifouling effect can be fully realized.

Description

technical field [0001] The invention relates to a spraying method, in particular to a composite coating for preventing marine biological fouling and a spraying method thereof, and belongs to the technical field of spraying. Background technique [0002] The marine biofouling of underwater hulls and components of ships navigating in the ocean is very serious, and marine fouling needs to be cleaned regularly. The commonly used antifouling treatment method is painting paint, including toxic antifouling paint, non-toxic antifouling paint, low surface energy paint antifouling, but using this method for antifouling treatment has a short period of effect and requires frequent antifouling processing, resulting in a waste of manpower and material resources. There are also anti-fouling methods using copper and copper alloys. Copper and copper alloys release copper ions due to their corrosion in seawater environments. They are often used in ship structures to prevent the growth of mar...

AI Technical Summary

Problems solved by technology

[0005] At present, the marine biofouling of underwater hulls and components of ships sailing in the ocean is very serious. The purpose of antifouling treatment cannot be achieved by using traditional methods, and the antifouling period of traditional methods is short. Using supersonic flame spraying, the prepared The transition layer and the insulating layer have a strong bonding force with the substrate, and the bonding strength is greater than 35MPa. When the cold spraying technology is used, the copper will not be oxidized, which can ensure the antifouling effect of the copper. The thermal spraying technology and the cold spraying technology are used reasonably. It can overcome the shortcomings of traditional methods and achieve remarkable results