A kind of anticorrosive coating for enhancing the corrosion resistance of steel in coastal port terminal and preparation method thereof

By introducing reactive fillers such as basic bismuth carbonate, bismuth oxide, and zinc phosphate into epoxy coatings and using a humidity-activated process, BiOCl and Zn(OH)2 insolubles are generated, solving the problem of poor anti-corrosion effect of epoxy coatings in marine environments and achieving self-healing and long-term protective effects of the coating.

CN122168132APending Publication Date: 2026-06-09XIAN THERMAL POWER RES INST CO LTD
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
CN202610641474.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-11
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing epoxy coatings are not effective in preventing corrosion in marine environments. They cannot actively respond to corrosive media and repair microscopic damage, leading to premature failure of protection.

Method used

A reactive filler system consisting of basic bismuth carbonate, bismuth oxide, and zinc phosphate is used, combined with a humidity-activated curing process, to form an in-situ self-sealing coating. Through ion exchange reactions, BiOCl and Zn(OH)2 insoluble substances are generated, which block the microscopic permeation channels and achieve self-repair.

Benefits of technology

The coating can actively respond to chloride ion intrusion, generate insoluble precipitates, effectively block the permeation channels, maintain high electrochemical impedance and interfacial adhesion for a long period of time, and significantly enhance corrosion resistance and service durability.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure SMS_15
    Figure SMS_15
  • Figure SMS_16
    Figure SMS_16
  • Figure SMS_24
    Figure SMS_24
Patent Text Reader

Abstract

The application relates to a corrosion-resistant coating for enhancing the corrosion resistance of a steel port terminal near the sea and a preparation method, and belongs to the technical field of corrosion-resistant coatings. The preparation method comprises the following steps: mixing bisphenol A type epoxy resin, an active diluent, a dispersing agent, a leveling agent, an anti-settling agent, alkaline bismuth carbonate, bismuth oxide and zinc phosphate to obtain component A; mixing component A with a curing agent, applying the mixture to the surface of a steel base material, and performing pre-curing to obtain a pre-cured coating; performing humidity activation treatment on the pre-cured coating to obtain a humidity-activated coating; and finally curing the humidity-activated coating to obtain the corrosion-resistant coating for enhancing the corrosion resistance of the steel port terminal near the sea. Through the specific humidity activation treatment step and the alkaline bismuth carbonate, bismuth oxide and zinc phosphate filler system, the coating has the ability to actively respond to the invasion of chloride ions, effectively blocks micro-penetration channels, and overcomes the technical difficulties that the coating performance is irreversibly attenuated and the activity of the filler is difficult to effectively stimulate.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Solvent-free epoxy coating and preparation method and application thereof in corrosion prevention in oil gas pipelines

    CN110317522A

  • Super-thick solvent-free epoxy coating for offshore steel pipe pile as well as preparation method and application of super-thick solvent-free epoxy coating

    CN119552556A