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ZLSIL-AC410 Calcium Ion-Exchanged Silica Anticorrosive Pigment
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ZLSIL-AC410 Calcium Ion-Exchanged Silica Anticorrosive Pigment
ZLSIL-AC410 Calcium Ion-Exchanged Silica Anticorrosive Pigment: A New-Generation Eco-Friendly Anti-Rust Solution
1. Product Overview
ZLSIL-AC410 is a new-generation eco-friendly anticorrosive pigment developed by Shandong Zhonglian Chemical Co., Ltd. using advanced ion-exchange technology. Based on high-purity amorphous silica (CAS 7631-86-9) as the carrier, it delivers exceptional anti-rust performance through calcium ion-exchange technology. The product appears as a white free-flowing powder with an amorphous structure, containing ≥90% silica and ≤10% moisture. It is widely applicable in both liquid coatings and powder coatings systems.
Unlike traditional anticorrosive pigments containing lead, chromium and other heavy metals, ZLSIL-AC410 fundamentally resolves the conflict between corrosion protection and environmental compliance, making it an ideal choice for the coatings industry as it transitions toward greener, higher-performance solutions.
2. Core Anticorrosive Mechanism
ZLSIL-AC410 delivers anti-rust protection based on a calcium ion-exchange release mechanism:
1. Ion-Exchange Protection: When corrosive media (water, oxygen, chloride ions) penetrate the coating and reach the metal interface, the active calcium ions in the pigment exchange with cations in the corrosive environment, forming a dense passivation film on the metal surface that inhibits electrochemical corrosion reactions.
2. Physical Barrier Effect: The microporous structure of amorphous silica effectively extends the permeation path of corrosive media, enhancing coating density and permeation resistance.
3. pH Buffering: The product maintains a slightly alkaline environment within the coating (pH 4.0–7.0 in 5% aqueous suspension), neutralizing acidic corrosive media and slowing acid-induced corrosion of the metal substrate.
The triple-protection synergy provides long-lasting, stable corrosion resistance for coatings.
3. Technical Specifications
Item | Specification |
Appearance | White powder |
Silica content | ≥90% |
Moisture content | ≤10% |
pH (5% aqueous suspension) | 4.0–7.0 |
CAS No. | 7631-86-9 |
EINECS No. | 231-545-4 |
Odor | None |
Flash point | Not applicable (non-flammable) |
4. Safety & Environmental Characteristics
4.1 Non-Hazardous Classification
According to GB/T 16483-2008 national standard and assessments under major global chemical regulations, ZLSIL-AC410 is not classified as a hazardous substance:
• Non-flammable, non-explosive, no dust explosion risk
• Transport not restricted by IMDG, IATA, ADR or other dangerous goods regulations
• No UN number; ships as general cargo
4.2 Low Toxicity & Safety
• Acute oral toxicity LD₅₀ > 5,000 mg/kg (practically non-toxic)
• Skin irritation test: 0/8, non-irritating
• Eye irritation test: Draize score 0.7/110, non-irritating
• AMES test negative for mutagenicity; no sensitization observed
• Contains no carcinogens listed by IARC, NTP or OSHA at concentrations >0.1%
4.3 Ecologically Friendly
• Fish acute toxicity EC₅₀ (96h) > 10,000 mg/L
• Daphnia acute toxicity EC₅₀ (24h) > 10,000 mg/L
• German water hazard class WGK: NWG (non-hazardous to water)
• Compliant with major global chemical inventories: AICS, DSL, EINECS, ENCS, KECL, TSCA, PICCS, etc.
4.4 Heavy Metal-Free
Contains no lead, chromium, cadmium, mercury or other toxic heavy metals. Fully compliant with EU REACH, RoHS and Chinese environmental regulations. An upgrade replacement for traditional toxic anti-rust pigments such as red lead and zinc chrome yellow.
5. Application Areas
ZLSIL-AC410 is suitable for various anticorrosive coating systems:
• Industrial anticorrosive coatings: Steel structures, bridges, pipelines, storage tank anti-rust primers
• Marine coatings: Ship bottom anti-rust paint, boot-topping paint
• Container coatings: Interior and exterior container corrosion protection
• Automotive coatings: Automotive primers, chassis armor
• Powder coatings: Anticorrosive enhancement for epoxy and polyester powder coatings
• Waterborne coatings: Eco-friendly waterborne industrial coating systems
• Coil coatings: Color-coated steel back paint corrosion protection
6. Product Advantages
Comparison Dimension | ZLSIL-AC410 | Traditional Cr/Pb Pigments | Conventional Zinc Phosphate |
Eco-friendliness | Non-toxic, globally compliant | Toxic, heavy metals, being phased out | Eco-friendly |
Anticorrosive efficiency | Ca ion-exchange, high-efficiency release | High but toxic | Moderate |
Whiteness | White, unlimited color matching | Colored, restricts tinting | White |
Dispersibility | Excellent, easy to disperse | Average | Average |
Storage stability | Stable, non-reactive with resins | May catalyze degradation | Good |
Shipping cost | General cargo, no restrictions | Dangerous goods, high freight | General cargo |
7. Usage Recommendations
1. Dosage: Recommended addition level is 5%–15% of total formulation weight, adjusted based on corrosion protection requirements. Heavy-duty systems: 10%–15%; light-duty: 5%–8%.
2. Dispersion process: Recommended addition during the sanding or high-speed dispersion stage to ensure uniform pigment distribution. The product disperses easily with no special treatment required.
3. Combination use: Can be used in combination with zinc phosphate, aluminum tripolyphosphate and other anti-rust pigments for synergistic effects and enhanced overall corrosion protection.
4. Storage conditions: Keep containers tightly sealed in a dry, cool, well-ventilated area. Do not store together with volatile chemicals (the product is adsorptive). Store at room temperature; shelf life is 24 months.
5. Handling protection: Although non-hazardous, wear dust masks, goggles and gloves during use to avoid dust inhalation; exhaust ventilation is recommended at production sites.
8. Packaging & Shipping
• Standard packaging: 25 kg/bag, inner PE film bag, outer woven bag
• Shipping: Classified as general chemical cargo; non-hazardous, no special restrictions
• Storage: Keep packaging sealed, protected from moisture and rain
9. Conclusion
ZLSIL-AC410 calcium ion-exchanged silica anticorrosive pigment uses amorphous silica as the carrier combined with advanced calcium ion-exchange technology to achieve the trifecta of high-efficiency corrosion protection, non-toxic safety, and environmental friendliness. As environmental regulations for the global coatings industry become increasingly stringent, ZLSIL-AC410 provides coating manufacturers with a high-performance, compliance-worry-free anti-rust solution, supporting customers in product upgrades and market expansion.
Shandong Zhonglian Chemical Co., Ltd.
Address: Jinan City, Shandong Province, China
Email: Levin@zhonglian-chem.com
Tel: +86-531-88737397
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