Aluminium tripolyphosphate | CAS 13939-25-8 | Advanced Anti-Corrosion Pigment for Coatings

📌 Detailed Introduction of Aluminium Tripolyphosphate

✔ What is Aluminium Tripolyphosphate?

Aluminium Tripolyphosphate (ATP) is an advanced anti-corrosion pigment primarily used in metal coatings and industrial paints. It provides long-term corrosion resistance by forming a protective phosphate layer on metal surfaces, preventing oxidation and rust formation. Unlike chromate-based pigments, ATP is non-toxic and environmentally friendly, making it a preferred choice for modern protective coatings.

✔ CAS Number & Chemical Formula:

• CAS Number: 13939-25-8

• Chemical Formula: AlH₂P₃O₁₂

• Molecular Weight: ~318 g/mol

📌 Product Specifications

📌 Applications of Aluminium Tripolyphosphate

✔ Industrial & Protective Coatings

• Used in anti-corrosion coatings for steel structures, bridges, ships, and pipelines.

• Forms a passivation layer that inhibits rust formation and metal degradation.

✔ Automotive & Marine Paints

• Enhances long-term durability of automobile chassis, ship hulls, and marine structures.

• Provides superior adhesion and resistance to harsh environments.

✔ Powder Coatings & Water-Based Paints

• Acts as an environmentally friendly alternative to lead and chromate-based pigments.

• Ensures high chemical resistance and thermal stability.

✔ Coil Coatings & Industrial Metal Finishing

• Applied in pre-coated metals, galvanized steel, and aluminum coatings.

• Improves corrosion protection without affecting paint adhesion.

✔ Aerospace & Defense Coatings

• Used in high-performance coatings for aircraft parts and defense equipment.

• Offers lightweight, high-temperature stability, and corrosion resistance.

📌 How Does Aluminium Tripolyphosphate Work?

1. Phosphating Reaction:

• Reacts with metal surfaces to form an insoluble phosphate film, preventing oxidation and corrosion.

2. Barrier Protection:

• Improves paint adhesion, creating a water-resistant layer that blocks moisture and oxygen.

3. Electrochemical Inhibition:

• Neutralizes the electrochemical process that causes rust, extending the lifespan of coatings.

📌 Production Method & Raw Materials

✔ Wet Chemical Process:

1. Raw Materials: Aluminium hydroxide (Al(OH)₃), phosphoric acid (H₃PO₄), and auxiliary agents.

2. Reaction: Materials undergo controlled neutralization and polymerization in a wet process.

3. Drying & Grinding: The slurry is dried, calcined, and ground into fine powder.

4. Quality Control: Final product undergoes purity and particle size testing.

📌 Famous Aluminium Tripolyphosphate Brands Worldwide

• Heubach (Germany)

• WPC Technologies (USA)

• Tayca Corporation (Japan)

• Jiangsu Khonor Chemicals Co., Limited (China)

📌 Why Choose Jiangsu Khonor Chemicals Co., Limited?

✔ High-Performance Corrosion Protection
✔ Eco-Friendly & Non-Toxic Alternative
✔ Customizable Particle Sizes & Formulations
✔ Strict Quality Control & International Compliance
✔ Reliable Supply & Competitive Pricing

📌 Order High-Quality Aluminium Tripolyphosphate from Jiangsu Khonor Chemicals Co., Limited!

Looking for a trusted supplier of Aluminium Tripolyphosphate (ATP)? We provide high-quality, environmentally friendly anti-corrosion pigments for industrial coatings, automotive paints, and metal protection.

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Aluminium Tripolyphosphate (ATP) Detailed Overview

1. Basic Information

• Chemical Formula: AlH₂P₃O₁₀

• Molecular Weight: 317.90 g/mol

• Appearance: White powder

• Solubility: Slightly soluble in water, soluble in acids

• pH Value (suspension): Approximately 3.0-5.0

• Density: 2.5-3.0 g/cm³

• CAS: 13939-25-8

Aluminium tripolyphosphate is an environmentally friendly inorganic anti-corrosion pigment that serves as an alternative to traditional lead- and chromium-based anti-rust pigments, such as red lead (Pb₃O₄) and zinc chromate (ZnCrO₄), thereby reducing environmental pollution and toxicity risks.

2. Key Characteristics

1. Excellent Anti-Corrosion Performance

• Its phosphate ions react with metal surfaces to form an insoluble phosphate protective layer, preventing the penetration of corrosive agents like water and oxygen.

• It provides good protection for steel, aluminum, galvanized metals, etc.

2. Eco-Friendly and Non-Toxic

• It does not contain lead, chromium, or other heavy metals, complying with international environmental standards such as RoHS and REACH.

3. Heat and Weather Resistance

• High thermal stability, making it suitable for high-temperature environments.

• Resistant to UV radiation, ensuring long-term outdoor durability.

4. Good Compatibility

• Compatible with various resin systems, including epoxy resins, alkyd resins, polyurethane resins, and acrylic resins.

3. Main Applications

As a high-performance anti-rust pigment, aluminium tripolyphosphate is widely used in:

1. Anti-Corrosion Coatings

• Industrial protective coatings for marine ships, containers, bridges, oil pipelines, and chemical equipment.

• Suitable for both water-based and solvent-based anti-rust paints, such as epoxy zinc-rich primers, alkyd anti-corrosion paints, and acrylic coatings.

2. Electrophoretic Coatings

• Used as an anti-rust filler in water-based electrophoretic paints to enhance corrosion resistance.

3. Powder Coatings

• Applied in powder coating systems to improve the protection of metal substrates.

4. Automotive and Machinery Industry

• Used as a primer material for automobiles and mechanical parts, extending their service life.

5. Refractory Materials

• Utilized in certain special refractory materials to enhance fire resistance.

4. Working Principle

The anti-corrosion mechanism of aluminium tripolyphosphate mainly involves the following aspects:

1. Chemical Passivation

• Phosphate ions (PO₄³⁻) react with the metal surface to form a dense phosphate protective film, preventing oxidation reactions.

2. Corrosion Inhibition

• Adsorbs onto the metal surface, suppressing the electrochemical corrosion process and reducing the corrosion rate.

3. Slow Release of Phosphate Ions

• Gradually releases phosphate ions within the coating, ensuring long-lasting protection.

5. International Leading Brands

Some well-known global manufacturers of aluminium tripolyphosphate include:

1. Germany - WPC (WayPlast Coatings)

• Products: ATP-100, ATP-200

• Specializes in high-performance anti-corrosion coatings.

2. Japan - Taihei Chemical Industrial Co., Ltd.

• Products: TPA-301, TPA-303

• Used in automotive and marine coatings.

3. United States - Heubach Group

• Produces eco-friendly anti-corrosion pigments in various specifications.

4. France - SNCZ (Société Nouvelle des Couleurs Zinciques)

• Specializes in high-end anti-rust pigments for industrial applications.

6. Development Trends

1. Shift Towards Water-Based Coatings

• With stricter environmental regulations, water-based anti-corrosion coatings are gradually replacing solvent-based coatings, leading to increased demand for ATP.

2. Nano and Composite Development

• Research focuses on developing nano-scale aluminium tripolyphosphate for better dispersion and corrosion resistance.

• Composite anti-rust pigments, such as phosphate-silicate hybrids, are gaining popularity.

3. Expanding Application Fields

• Besides traditional anti-corrosion coatings, aluminium tripolyphosphate is also being explored in electronic coatings, smart coatings, and other advanced applications.

7. Conclusion

Aluminium tripolyphosphate is a high-performance, eco-friendly inorganic anti-corrosion pigment. With its excellent rust protection and environmental safety, it has gained widespread application in industrial coatings worldwide. As environmental regulations tighten and material technologies advance, the market demand for ATP is expected to continue growing, especially in water-based anti-corrosion coatings and high-performance protective coatings.

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