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Zinc phosphate-based corrosion inhibitor with optimized particle size distribution for enhanced dispersion and barrier performance.
Low heavy metal content, compliant with RoHS and REACH regulations for sustainable industrial use.
Excellent compatibility with epoxy, alkyd, and acrylic resin systems without compromising film integrity.
Provides active passivation of steel substrates through controlled release of inhibiting phosphate ions.
Non-toxic alternative to chromate and lead-based pigments, supporting safer manufacturing and handling.
Marine coatings for ship hulls, offshore platforms, and port infrastructure.
Industrial maintenance paints for steel bridges, storage tanks, and chemical plant equipment.
Automotive underbody and chassis primers requiring long-term rust prevention.
Railway vehicle coatings exposed to high humidity, salt spray, and cyclic weathering.
| Chemical Type | Zinc polyphosphate (modified orthophosphate) |
| Product Form | Fine white to off-white powder |
| Appearance | Free-flowing, non-caking powder |
| Primary Applications | Anti-corrosive primers and basecoats for ferrous metals |
| Key Features | Passivation, barrier formation, pH buffering in coating film |
| Benefits | Extended service life, reduced maintenance frequency, regulatory compliance |
| Storage Conditions | Keep dry at 5–30 °C; protect from moisture and direct sunlight |
| Density (g/cm³) | ~3.2 (approx., as supplied) |
Q1: What is the primary corrosion inhibition mechanism of HEUCOPHOS ZPO?
A: HEUCOPHOS ZPO functions primarily through passivation of metal substrates—especially steel and aluminum—by forming a protective, insoluble complex layer at the metal–coating interface. Its zinc phosphate-based chemistry promotes stable oxide/hydroxide film formation, reducing electrochemical activity and delaying onset of rust.
Q2: Is HEUCOPHOS ZPO compatible with waterborne coating systems?
A: Yes, HEUCOPHOS ZPO is specifically engineered for compatibility with both solvent-borne and modern waterborne industrial coatings, including acrylic, epoxy, and polyurethane dispersions. Its surface treatment ensures good dispersion stability and minimal impact on pH sensitivity or storage life in aqueous formulations.
Q3: How does HEUCOPHOS ZPO compare to traditional red lead or chromate pigments in terms of environmental profile?
A: Unlike red lead or hexavalent chromium compounds, HEUCOPHOS ZPO is a non-toxic, heavy-metal-free alternative compliant with global regulatory trends—including RoHS, REACH SVHC screening, and VOC-reduction initiatives. It contains no lead, cadmium, mercury, or hexavalent chromium, making it suitable for sustainable coating development without compromising baseline anti-corrosive performance.
Q4: What is the recommended dosage range for optimal performance in primer formulations?
A: Dosage depends on formulation requirements and target corrosion resistance level, but HEUCOPHOS ZPO is typically used at low concentrations—generally ranging from 0.1% to 2% by weight in the total paint system. Optimal loading should be determined via lab-scale corrosion testing (e.g., salt spray, humidity cycling) alongside rheological and adhesion evaluation.
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E-mail: wangxingqiang@ericwchem.com
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