A shaped zinc powder for waterborne epoxy anti-corrosion primer, its preparation method and application

By using ball milling and modified coating liquid technology, the problem of poor chemical stability of zinc powder in water-based anti-corrosion coatings was solved, achieving efficient storage and excellent anti-corrosion performance of zinc powder, and improving the adhesion and salt spray resistance of zinc powder.

CN121673860BActive Publication Date: 2026-05-26INNER MONGOLIA XUYANG NEW MATERIALS CO LTD
View PDF 1 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INNER MONGOLIA XUYANG NEW MATERIALS CO LTD
Filing Date
2026-02-10
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The chemical stability of zinc powder in existing water-based anti-corrosion coatings is poor, leading to excessive consumption of zinc powder, which affects the sacrificial anode capability and salt spray resistance, and poses safety hazards, making it difficult to achieve true full water-based coatings and excellent anti-corrosion performance.

Method used

Spherical zinc powder is used as raw material. It is ball-milled to form an irregular shape and then coated with a modified coating liquid. The modified coating liquid is prepared by sol-gel method containing epoxy silane oligomers, cerium salts and passivating agents to form a protective layer and improve the chemical stability and conductivity of zinc powder.

Benefits of technology

It improves the storage stability of zinc powder in water-based coatings, avoids clumping and sedimentation, enhances the conductivity and adhesion of zinc powder, strengthens anti-corrosion performance and substrate bonding stability, simplifies the construction and dispersion process, and has excellent salt spray resistance.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN121673860B_ABST
    Figure CN121673860B_ABST
Patent Text Reader

Abstract

This invention discloses a shaped zinc powder for waterborne epoxy anti-corrosion primers, its preparation method, and its application in the field of chemical technology. Using spherical zinc powder as raw material, it is ball-milled to obtain an irregular shape while being coated with a modified coating liquid to form a protective layer on its surface, thus obtaining the shaped zinc powder. The modified coating liquid is prepared from epoxy-containing silane oligomers using an acid-catalyzed sol-gel method to obtain a sol, and then cerium salts and passivating agents are added to the sol. The shaped zinc powder provided by this invention has moderate cost, good anti-corrosion performance, high storage stability, and strong adhesion in paint films. Furthermore, the shaped zinc powder can be directly added to waterborne coating systems during production, eliminating the need for high-speed secondary mixing and dispersion at the construction site, resulting in high construction efficiency.
Need to check novelty before this filing date? Find Prior Art