Long-acting protective liquid self-secreting super-lubricity coating and preparation method thereof

Abstract

The invention discloses a long-acting protective liquid self-secreting super-lubricity coating and a preparation method thereof, and belongs to the anti-corrosion, anti-fouling and anti-icing fields and the like. A coating body is an elastic porous film layer and is divided into a bottom layer, an upper layer and a surface layer. The bottom layer is of a large pore structure, the porosity is as high as 60%-95%, the pore diameter ranges from 100 microns to 2000 microns, and the oil storage amount is increased; the upper layer pore diameter ranges from 10 nm to 100 microns, the thickness rangesfrom 50 microns to 1000 microns, oil is prevented from being lost too fast, and the secretion process is controlled; and the surface layer is of a micro-nano-level convex structure, the roughness ranges from 10 nm to 50 microns, and the lyophobic and oil storage effects are achieved. Lubricating oil is stored in the porous structure, when surface oil dries, the oil can be gradually diffused to thesurface layer through upper-layer small holes to form a liquid protective oil film. Corrosion inhibitors, bactericides and the like added into the lubricating oil are released along with the oil, andthe protective function of the coating is enhanced. When environmental water flow impact, external force extrusion, friction and the like lead to losing of the surface oil film, the external force effect will also promote deformation of the elastic porous structure to secrete oil, it keeps that a stable oil layer is formed on the surface, and the service life of the coating is significantly prolonged.

Description

technical field [0001] The invention belongs to the technical field of surface protection, and is suitable for preparing functional coatings such as surface anticorrosion, anti-icing, anti-fog and anti-fouling. Background technique [0002] Engineering facilities such as steel structures in bridges and roads, offshore platforms, ship dock metals, etc. are directly exposed to the environment and will be damaged by corrosive media, icing, and microbial fouling. Coating protection has become one of the most widely used methods for surface protection of engineering facilities, equipment and instruments because of its excellent performance, simple construction, wide application, low cost, and easy combination with other protective methods. However, traditional protective coatings are solid, such as phosphating coatings, galvanized coatings, polymer coatings, etc., have certain limitations: for example, dissolved phosphorus, chromium, copper, etc. in the coating are degraded or se...

AI Technical Summary

Problems solved by technology

[0005] The invention develops a novel super-slip coating with long service period, simple process...

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