Rust inhibitor for marine reinforced concrete and preparation method thereof

By using a double-walled nano-microcapsule powder rust inhibitor, multi-stage protection is provided for marine reinforced concrete structures, solving the problems of early depletion, late failure, and protection gaps during construction. It achieves triple protection of physical barrier, electrochemical stability, and nanostructure self-adaptation, significantly extending service life.

CN121107737APending Publication Date: 2025-12-12CHINA RAILWAY 11TH BUREAU GRP CORP LTD +1
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Patent Information

Application Number
CN202511140682.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-15
Publication Date
2025-12-12

AI Technical Summary

Technical Problem

Existing marine reinforced concrete structures suffer from problems such as early depletion, late-stage failure, lack of on-demand response capability, single-mechanism protection, and protection gaps during the construction period in terms of corrosion protection.

Method used

The double-walled shell nanocapsule powder is used as a rust inhibitor, which includes a core phase and an outer shell phase, an inner shell and an outer shell. The inner shell is composed of modified epoxy resin and other materials, and the outer shell is composed of alginate and other materials. The nano additives include nano SiO2 and layered bimetallic hydroxides, providing triple protection of physical barrier, electrochemical stability and nanostructure self-adaptation.

Benefits of technology

It achieves multi-stage protection throughout the entire service life of concrete, forming a dense film barrier in the early stage, releasing corrosion inhibitors as needed in the middle and later stages, providing continuous physical barrier and electrochemical stability, avoiding protection gaps, improving the steel reinforcement's resistance to chloride ion corrosion, and taking into account both environmental safety and long-term effectiveness.

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Abstract

The invention discloses a corrosion inhibitor for marine reinforced concrete and a preparation method, and relates to the technical field of corrosion inhibitors. The corrosion inhibitor is double-layer wall shell nanometer micro-capsule powder, the average particle size is 50-100 microns, a core phase comprises an inorganic corrosion inhibitor, an organic film-forming agent, a pH adjusting and mineralizing component and / or sacrificial anode particles, and a shell phase is composed of an inner layer shell, an outer layer shell and a nanometer additive. The corrosion inhibitor realizes triple protection in concrete through physical barrier, electrochemical stability and nano-structure self-adaptive response, and can be coated on the surface of a steel bar to form a temporary protection film in a construction period. W / O / W double emulsification, shell layer curing and spray drying processes are adopted for preparation, so that controllable release and stable components are ensured. In application, continuous protection from the construction period to the whole life cycle can be achieved, and the durability and chloride ion corrosion resistance of marine reinforced concrete are remarkably improved.
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