Views: 0 Author: Site Editor Publish Time: 2025-12-02 Origin: Site
With the rise of ultra-weather-resistant and corrosion-resistant building materials, double-coated aluminum powder has become a new benchmark for high-performance powder coatings. This technology combines a silica coating and a resin binder, significantly improving durability compared to standard surface-treated aluminum powder. This article will explain its working principle and the reasons why more and more manufacturers are adopting this technology.
Double coated aluminum powder is engineered using a resin-bonded silica double-layer surface treatment.
This process creates a dual protective shell:
First layer: SiO₂ treatment – provides chemical stability and oxidation resistance.
Second layer: Acrylic resin bond – improves adhesion, weatherability, and long-term protection.
Independent industry tests indicate that resin-bonded SiO₂ coatings can improve salt-spray resistance by 50–70% compared with conventional coated aluminum powders (Global Coatings Benchmark Report, 2024).
The double-layer system effectively protects aluminum flakes from corrosive environments.
This makes it ideal for architectural powder coatings exposed to humidity, pollution, or coastal conditions.
The acrylic resin layer prevents degradation when coatings encounter alkaline construction materials.
This is especially valuable for exterior building components and façade systems.
Despite the heavy-duty protection, double coated aluminum powder still maintains a smooth metallic effect and excellent orientation.
Technical Data (from Silver Rocket):
| Grade | D50 (µm) | Non-Volatile Content | Coating Type |
|---|---|---|---|
| YJU-11A | 11 | ≥99.0% | SiO₂ + Acrylic Resin |
| YJU-18 | 18 | ≥99.0% | SiO₂ + Acrylic Resin |
| YJU-35 | 35 | ≥99.0% | SiO₂ + Acrylic Resin |
| YJU-50 | 50 | ≥99.0% | SiO₂ + Acrylic Resin |
| Feature | Single SiO₂ Coated | Double Coated (SiO₂ + Resin) |
|---|---|---|
| Salt-Spray Resistance | Good | Excellent |
| Chemical Resistance | Moderate | High |
| Mortar Resistance | Limited | Superior |
| Weatherability | Good | Premium Exterior Level |
| Durability in Architectural Use | Medium | Ultra-High |
Up to 70% better corrosion resistance
Improved resistance to alkaline building materials
Outstanding metallic stability in long-term outdoor exposure
This positions double coated aluminum powder as the preferred choice for premium powder coating systems.
Used in high-end building materials requiring:
Long weathering cycles
Corrosion resistance
Chemical stability
Examples:
Aluminum window frames, façade panels, railings, exterior decorative elements.
Where durability and chemical exposure are major concerns.
Ideal for areas with harsh climates—high UV exposure, marine environments, heavy pollution.
Dense SiO₂ focuses on inorganic corrosion resistance.
Double coating combines inorganic + organic layers, offering superior mortar and chemical resistance.
No. The acrylic resin is designed to be thin, ensuring metallic brightness is retained.
Yes, but its strongest value is in architectural and exterior powder coatings requiring extreme stability.
Yes. Silver Rocket offers custom particle sizes, coating ratios, and OEM-grade solutions for global clients.
Double coated aluminum powder provides unmatched durability for architectural and industrial coatings.
Its dual-layer protection system—SiO₂ plus acrylic resin—makes it the ideal solution for environments where corrosion, alkalinity, and weathering are severe.
For technical support, samples, or OEM cooperation, contact:
www.silverocket.com
info@silverocket.com