Recommended products:Silica Anti-corrosive Pigment HOMAC® LM50 -Universal for Water and Oil, Non-Toxic

HOMAC^® is a series of high-efficiency, non-toxic ion-exchange anti-corrosive pigments free of chromium and other heavy metals. Modified from silica gel, it provides excellent long-term anti-corrosion effects. It fully complies with the heavy metal limit requirements in GB 30981-2020 Limit of Harmful Substances in Industrial Protective Coatings, serving as an effective alternative to chromium-containing and heavy metal pigments.

•Features low pore size and high specific surface area, resulting in a high content of active particles per unit mass.

•Forms a silicate surface passivation layer, effectively reducing paint film blistering and permeability.

•Universal for water-based and oil-based systems, and can be combined with other types of anti-corrosive pigments or fillers for synergistic anti-corrosion effects.

Theory

When corrosive ions (e.g., H+) penetrate into the film, the ion-exchanged silica particles, due to their large specific surface area, effectively adsorb and exchange hydrogen ions, and the released calcium ions migrate to the metal surface of the substrate. Due to the inevitable elector-chemical reaction on the surface of the metal substrate, OH- is formed, which in turn partially generates silicate ions with silicon dioxide particles. During an elector-chemical reaction, iron atoms are oxidized into iron ions. The resulting iron ions and the released calcium ions combine with silicate ions to form inert silicates, which are deposited on the surface of the metal substrate. These two silicates are chemically stable and deposited on the surface of the metal to form a composite passivation layer, which can play a long-term protective role and delay the corrosion of the metal.

Lingwei Technology's Silica Anti-corrosive Pigment -HOMAC^® LM50 is a silica-based ion-exchange anti-corrosive pigment, mainly composed of silica gel pigment. It is non-toxic, free of heavy metals, compliant with current environmental regulations, and fully environmentally friendly.

Performance Advantages

Environmentally friendly anti-corrosive pigment, chromium-free and heavy metal-free;

Long-term anti-corrosive performance;

Improves paint film density and inhibits blistering and permeability;

Obvious anti-corrosion synergistic effect, offering higher advantages when paired with other active anti-corrosive pigments;

Universal for water and oil, and can be arbitrarily matched with other types of pigments and fillers

Application Fields

Coil coating thin-layer primers;

General industrial anti-corrosive coatings;

Technical Specifications

The above test methods comply with HG/T 4526-2013 Matting Silica standard.

Recommended Addition Rate

Based on the total formula, the recommended addition rate is 3%～10%;

Due to different formulas and conditions, users are advised to conduct tests before use to determine the optimal addition rate.

Packaging and Storage Precautions

For detailed information on product packaging specifications, please consult your local sales representative;

This product is a silica type with extremely stable properties. Due to its high specific surface area, it easily absorbs moisture or volatile substances from the atmosphere. Therefore, it is recommended to store it in a dry, ventilated, and cool place to avoid moisture or volatile substances. Under the above storage conditions, the general recommended storage period does not exceed 24 months. If used beyond 24 months, application tests are recommended for evaluation.