High-Performance Silica Anti-Corrosion Pigments

Created on 2025.11.13

Silica can serve as an efficient anti-Corrosion pigment due to its dense structure and chemical stability, which allows it to form a protective barrier on metal surfaces, blocking the intrusion of corrosive factors.

 Production Process

Industrial production primarily uses a modified precipitation method: sodium silicate is reacted with dilute sulfuric acid to produce silica precipitate. After washing to remove impurities, anti-rust components such as zinc salts and chromates are added for surface modification. The particle size is then controlled through spray drying to obtain a composite anti-rust pigment. This process is cost-effective and can enhance compatibility with coatings through modification.

Anti-Corrosion Mechanism

Its anti-rust effect is manifested in two ways: first, physical shielding, where silica particles are densely packed within the coating, forming a continuous and dense barrier layer that prevents corrosive media such as water, oxygen, and chloride ions from contacting the metal substrate; second, corrosion inhibition synergy, where the surface-modified anti-rust components can react with the metal to form a passivation film, further enhancing corrosion resistance.

 Application Fields

Widely used in industrial anti-corrosion fields, such as marine primers, bridge anti-corrosion coatings, and automotive chassis coatings, it can adapt to harsh environments like humidity and salt spray. It is also used for anti-rust coatings on mechanical parts and steel structures, and plays an important role in the protection of construction steel and hardware accessories, effectively extending the service life of metal products.

Quanxu Technology has been deeply involved in the chemical industry for over 20 years, focusing on the R&D and innovation of a full range of silica products. The product line covers matting agents, silica anti-corrosion pigments, nano/fumed alumina, and paper chemicals.