Protective coating as well as preparation method and application thereof

By preparing a layered protective coating on the surface of concrete materials and utilizing a combination of two-dimensional sheet materials and mineralized layers, the problems of insufficient mechanical strength and poor corrosion resistance of existing coatings are solved, and high mechanical properties and corrosion resistance are improved, making it suitable for complex environments such as bridges, nuclear power plants, and marine engineering.

CN120795673APending Publication Date: 2025-10-17QINGDAO UNIV OF TECH
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Patent Information

Application Number
CN202510976504.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-15
Publication Date
2025-10-17

AI Technical Summary

Technical Problem

Existing bionic polymer composite inorganic coatings lack mechanical strength for surface protection of concrete materials, cannot meet the wear resistance requirements in high-frequency load environments such as highways and heavy-load railways, and are susceptible to chloride ion corrosion in marine engineering.

Method used

The protective coating adopts a layered structure, including an induction layer, an organic-functional material layer and a mineralized layer. The organic-functional material layer is composed of two-dimensional sheet materials and granular materials, and the mineralized layer is composed of calcium phosphate or calcium carbonate. The mechanical properties and corrosion resistance of the coating are improved through chemical bonding and interfacial effects.

Benefits of technology

It enhances the mechanical properties and corrosion resistance of the coating, improves the wear resistance, reduces the chloride ion diffusion coefficient, prolongs the substrate corrosion induction period, meets the multifunctional needs of scenarios such as bridges, nuclear power and marine engineering, and improves the service stability of concrete materials.

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Abstract

The invention belongs to the technical field of protective coatings, and provides a protective coating as well as a preparation method and application thereof. The organic-functional material layer is introduced between the induction layer and the mineralization layer. On one hand, the functional material is embedded into the induction layer through chemical bonding and interface action, the specific surface area of the surface is increased, more active sites are provided for growth of inorganic crystals in the mineralization layer, then the compactness of the mineralization layer is improved, and the mechanical performance of the protective coating is enhanced. On the other hand, when the functional material is a two-dimensional lamellar material, a compact barrier layer is constructed to isolate permeation of corrosive ions such as Cl <-> and SO4 < 2->, so that the chloride ion diffusion resistance coefficient is reduced, the corrosion induction period of the matrix is prolonged, and the corrosion resistance of the protective coating is improved; in addition, the functional material can endow the protective coating with functionality by grafting and loading a functional reagent, and particularly, the long-term effect of the anti-corrosion function of the protective coating can be improved by grafting and loading an anti-corrosion component on the functional material.
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