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Zinc-calcium phosphate-based hybrid pigment delivering synergistic cathodic and barrier protection.
Low toxicity alternative to traditional chromate and lead-based anti-corrosive pigments.
Excellent dispersion stability in waterborne and solventborne epoxy, alkyd, and polyurethane coating systems.
Enhanced passivation effect on steel substrates, reducing red rust formation under humid and salt-spray conditions.
Compatible with common corrosion inhibitors and extenders, supporting optimized pigment volume concentration (PVC) design.
Marine and offshore protective coatings for hulls, decks, and ballast tanks.
Industrial maintenance coatings for steel structures in chemical plants and power generation facilities.
Automotive chassis and underbody primers requiring high-durability corrosion resistance.
Railway vehicle coatings, including bogies, car bodies, and freight wagons.
Heavy-duty equipment coatings for agricultural, construction, and mining machinery.
| Chemical Type | Zinc-calcium phosphate hybrid |
| Product Form | Fine dry powder |
| Appearance | White to off-white free-flowing powder |
| Primary Applications | Anti-corrosive primers and basecoats for ferrous metals |
| Key Features | Cathodic protection + passive film formation |
| Benefits | Reduced environmental hazard, RoHS-compliant formulation support |
| pH (10% aqueous suspension) | 7.5 – 8.5 |
| Moisture Content (max.) | 1.5 wt.% |
Q1: What is the primary corrosion inhibition mechanism of HEUCOPHOS ZCP plus?
A: HEUCOPHOS ZCP plus functions primarily through a synergistic passivation mechanism—its zinc-calcium phosphate-based composition promotes the formation of protective, insoluble metal-phosphate layers on ferrous substrates, effectively blocking electrochemical corrosion pathways and enhancing barrier performance in coatings.
Q2: Is HEUCOPHOS ZCP plus compatible with waterborne coating systems?
A: Yes, HEUCOPHOS ZCP plus is specifically engineered for compatibility with both solvent-borne and waterborne industrial coatings—including acrylics, epoxies, and polyurethane dispersions—without compromising dispersion stability or long-term storage performance.
Q3: How does HEUCOPHOS ZCP plus compare to traditional zinc chromate or red lead pigments in terms of environmental profile?
A: Unlike zinc chromate or red lead, HEUCOPHOS ZCP plus is chromium-free, lead-free, and heavy-metal-reduced, aligning with global regulatory trends toward safer alternatives while maintaining robust anticorrosive functionality in demanding industrial applications.
Q4: What is the typical dosage range for optimal performance in primer formulations?
A: Dosage depends on formulation requirements and target performance, but HEUCOPHOS ZCP plus is typically used at low concentrations—generally ranging from 0.1% to 2% by weight in the total paint solids—to achieve effective corrosion protection without adversely affecting rheology or film integrity.
Q5: Can HEUCOPHOS ZCP plus be used in high-gloss topcoats, or is it limited to primers and mid-coats?
A: While most effective in corrosion-inhibiting primers and undercoats, HEUCOPHOS ZCP plus can be incorporated into certain mid-coat and topcoat systems where moderate pigment loading and careful formulation balance are maintained—though gloss retention and color clarity should be verified case-by-case during development.
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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
