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Environmentally advanced phosphate-based anti-corrosive pigment with reduced heavy metal content.
Offers excellent passivation of steel surfaces through formation of protective iron phosphate layers.
Compatible with waterborne and solventborne epoxy, acrylic, and alkyd coating systems.
Enhances long-term corrosion resistance without compromising coating adhesion or flexibility.
Designed for low-VOC formulations and compliant with evolving regulatory requirements for industrial coatings.
Marine and offshore protective coatings for hulls, decks, and ballast tanks.
Industrial maintenance coatings for steel structures in chemical plants and refineries.
Automotive underbody and chassis primers requiring enhanced rust inhibition.
Bridge and infrastructure coatings exposed to humid, saline, or industrial atmospheres.
Railway wagon and container coatings demanding durable, low-toxicity corrosion protection.
| Chemical Type | Modified zinc-aluminium phosphate complex |
| Product Form | Fine, free-flowing powder |
| Appearance | White to off-white powder |
| Primary Applications | Anti-corrosive primer and intermediate coat pigments |
| Key Features | Passivation-based corrosion inhibition, low solubility, pH buffering capacity |
| Benefits | Reduced reliance on chromates and lead-based pigments; improved environmental profile |
| Storage Conditions | Store in dry, cool conditions; protect from moisture and direct sunlight |
| Recommended Loading Level | 15–30 wt% in dry pigment volume (based on total pigment solids) |
Q1: What is the primary corrosion inhibition mechanism of HEUCOPHOS SRPP?
A: HEUCOPHOS SRPP functions primarily through passive film formation on metal substrates, leveraging its phosphate-based chemistry to promote stable, protective oxide layers—particularly effective on ferrous metals and aluminum alloys in atmospheric and mildly aggressive environments.
Q2: Is HEUCOPHOS SRPP compatible with waterborne coating systems?
A: Yes, HEUCOPHOS SRPP is specifically engineered for compatibility with both solvent-borne and waterborne industrial coatings, including acrylic, epoxy, and polyurethane dispersions. Its surface treatment ensures good dispersion stability and minimal impact on pH or rheology in aqueous formulations.
Q3: How does HEUCOPHOS SRPP compare to traditional zinc phosphate pigments in terms of environmental profile?
A: Unlike conventional zinc phosphate, HEUCOPHOS SRPP is a non-zinc, heavy-metal-free alternative designed to meet evolving regulatory expectations. It avoids zinc-related ecotoxicity concerns while maintaining robust anti-corrosive performance in primer and mid-coat applications.
Q4: What is the typical dosage range for optimal performance in protective coatings?
A: Dosage depends on formulation requirements and target performance, but HEUCOPHOS SRPP is typically used at low concentrations—generally ranging from 0.1% to 2% by weight in the total paint system—to achieve effective corrosion inhibition without compromising film integrity or gloss retention.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
