Titanium alloy surface anti-fouling composite coating as well as preparation method and application thereof

Abstract

The invention discloses a titanium alloy surface anti-fouling composite coating as well as a preparation method and application thereof. The composite coating comprises a titanium dioxide porous layer combined with a titanium alloy surface and a lubricating layer covering the titanium dioxide porous layer, and pores of the titanium dioxide porous layer are filled with lubricating liquid. The composite coating provided by the invention has the characteristics of strong binding force with a base material, good wear resistance and long service life, has strong surface anti-fouling capability, and can prevent biological adhesion.

Description

technical field [0001] The invention relates to the technical field of surface modification of metal materials, in particular to an antifouling composite coating on the surface of a titanium alloy, a preparation method and application thereof. Background technique [0002] Titanium metal is known as "marine metal". It has excellent seawater corrosion resistance and comprehensive mechanical properties, and hardly corrodes and dissolves in seawater, and hardly pollutes the marine ecological environment. Therefore, it is considered to be a very ideal green marine engineering materials. However, titanium metal has good biocompatibility and is an ideal habitat for marine organisms, resulting in a more serious biofouling problem of titanium metal in marine engineering applications than other metal materials. The formation of marine biofouling is extremely harmful to the marine industry. It will not only cause a decline in the service performance of marine engineering equipment, b...

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Problems solved by technology

This type of method needs to add a variety of ions, and also involves high-energy-consuming processes such as high-temperature treatment in a muffle furnace. A single-layer film is formed, and the thin film layer is only nanometer-level thick, and the thinner film layer is easily damaged during service. It peels off from the substrate, and the corrosion resistance is very poor, so the film layer prepared by this thermal oxidation treatment method is difficult to apply to the harsh environment of the ocean

(3) Micro-arc oxidation is used to form a protective layer on the surface of titanium alloy. Although the protective layer has a certain antifouling effect, the electrolyte used in related technologies generally contains toxic metal ions or reagents, which will cause harm to marine organisms, the environment and the human body. very harmful

Among them, the friction coefficient of molybdenum disulfide and epoxy resin is relatively large, and it is difficult to disperse evenly in organic liquids, and the mixture of molybdenum disulfide and epoxy resin does not have the performance of repelling various liquids such as organic or biological liquids, so it is difficult to achieve super lubricity and anti-corrosion. Fog effect, cannot be used in marine environment antifouling

[0006] In short, in terms of anti-marine biofouling of titanium alloys, the related technologies have harm to organisms and the environment, poor bonding between the coating and the substrate, easy peeling off from the substrate during service, poor wear and corrosion resistance, or Processing is expensive, and large-scale industrial production is impossible. Therefore, the development of a technology with good anti-marine biofouling effect, environmental friendliness, good adhesion between coating and substrate, simple process and low cost, and large-scale application is very important for the marine industry. of great significance

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