HX AP-10 Modified aluminum & zinc phosphate
in waterborne coating systems where moisture penet
Technical Information
What Is HX AP-10 Modified Aluminum & Zinc Phosphate
HX AP-10 is a magnesium-modified aluminum tripolyphosphate — a white, non-toxic anti-corrosion pigment engineered for metal protective coatings. Unlike traditional zinc phosphate, the magnesium modification forms an ordered passivation film on the substrate surface, enhancing water resistance while maintaining excellent adhesion. This product performs exceptionally well in waterborne epoxy coatings, where its balanced solubility and ion-exchange mechanism provide long-term corrosion inhibition without the environmental concerns associated with zinc-heavy formulations.
Key Features
- Magnesium-Modified Chemistry — Magnesium ions strengthen the passivation layer on metal substrates, improving water resistance over standard aluminum tripolyphosphate grades
- Environmentally Compliant — Non-toxic, zinc-free formulation meeting global regulatory requirements for eco-friendly anti-corrosion pigments
- Excellent Waterborne Compatibility — Optimized for waterborne epoxy and acrylic systems; disperses readily without viscosity spikes
- Broad Substrate Protection — Effective on steel, galvanized steel, and aluminum substrates
- Low Oil Absorption (30-40 g/100g) — Allows high pigment loading without compromising film integrity
- Controlled Particle Size — D50: 1.0-5.0 μm with sieve residue <1.0% on 45 μm, ensuring smooth film surface
Recommended Applications
| Application | Suitability |
|---|---|
| Decorative Water Base Paints | ✅ Recommended |
| Decorative Solvent Base Paints | ✅ Recommended |
| Industrial Paints | ✅ Recommended |
| Powder Coatings | ⚪ Suitable |
| Decorative Universal Stainers | ✅ Recommended |
| Automotive OEM | ❌ Not Recommended |
| Automotive Refinish | ❌ Not Recommended |
✅ Recommended | ⚪ Suitable | ❌ Not Recommended
Technical Data
| Physical Form | White powder |
| Oil Absorption | 30-40 g/100g |
| Water Soluble Matter | < 1.5% |
| pH Value | 5.0-8.0 |
| Sieve Residue (45 μm) | < 1.0% |
| Primary Particle Size D50 | 1.0-5.0 μm |
Packaging
25 kg/bag. Custom packaging available upon request.
Frequently Asked Questions
What makes HX AP-10 different from standard aluminum tripolyphosphate?
The magnesium modification is the key differentiator. Standard aluminum tripolyphosphate relies primarily on phosphate ion exchange for corrosion inhibition. HX AP-10’s magnesium ions create a more ordered and durable passivation film on metal substrates, significantly improving water resistance — a critical advantage in waterborne coating systems where moisture penetration is a primary failure mode.
Can HX AP-10 replace zinc phosphate in my formulation?
In most waterborne epoxy and acrylic systems, yes. HX AP-10 is designed as a drop-in replacement for zinc phosphate with comparable or superior anti-corrosion performance. The transition typically requires minor adjustments to pigment volume concentration (PVC) due to its lower oil absorption (30-40 vs. zinc phosphate’s typical 15-25). We recommend running a full formulation compatibility test, particularly for solvent-based high-gloss systems where the slightly higher oil absorption may impact gloss.
Is HX AP-10 suitable for direct-to-metal (DTM) coatings?
Yes. The magnesium-modified passivation layer forms rapidly on bare steel and galvanized substrates, making HX AP-10 well-suited for DTM applications. In accelerated corrosion testing (ASTM B117 salt spray), formulations containing HX AP-10 at 5-8% PVC typically achieve 500+ hours on cold-rolled steel without creep from scribe.
What regulatory certifications does HX AP-10 meet?
HX AP-10 is formulated as a zinc-free, non-toxic anti-corrosion pigment. It complies with major global environmental regulations for heavy-metal-free coatings. Specific compliance documentation (REACH, RoHS, FDA indirect contact) is available upon request.
Disclaimer — This Technical Data Sheet reflects our best understanding of typical product properties at the time of publication. Listed values are representative of standard production and are not intended as specifications, contractual parameters, or fitness guarantees. Batch variations within normal manufacturing tolerances may occur; users should verify critical parameters against their own requirements before use. Processing methods, formulations, and end-use environments are beyond the manufacturer’s control. The buyer assumes full responsibility for confirming product suitability through its own testing and quality assurance. No intellectual property license is granted or implied. All warranties are disclaimed, including merchantability and fitness for a particular purpose. The manufacturer is not liable for incidental, consequential, or special damages. All sales are governed by the manufacturer’s standard terms, available upon request. This product may contain particles below 0.1 μm.