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High-efficiency active passivation mechanism for long-term corrosion inhibition on ferrous substrates.
Low toxicity and heavy-metal-free formulation compliant with RoHS and REACH regulatory requirements.
Excellent compatibility with epoxy, polyurethane, and alkyd resin systems without compromising film integrity.
Enhanced pigment dispersion stability, reducing settling and improving batch-to-batch consistency in coatings.
Thermally stable up to 200 °C, supporting use in high-temperature industrial coating applications.
Marine coatings for offshore platforms and ship hulls.
Industrial maintenance coatings for steel structures in chemical plants and refineries.
Bridge and infrastructure protective coatings exposed to harsh atmospheric conditions.
Oil & gas pipeline external and internal anticorrosive primers.
Railway carriages and heavy-duty transport equipment coatings.
| Chemical Type | Modified phosphate-based complex |
| Product Form | Fine dry powder |
| Appearance | Off-white to light grey free-flowing powder |
| Primary Applications | Anticorrosive primers and intermediate coats |
| Key Features | Passivation, barrier enhancement, alkali resistance |
| Benefits | Reduced zinc loading, extended service life, improved adhesion |
| pH (1% aqueous suspension) | 7.2–8.0 |
| Specific Gravity | 3.1–3.4 g/cm³ |
Q1: What is the primary corrosion-inhibition mechanism of CATHAYTHERM GA76?
A: CATHAYTHERM GA76 functions primarily through passive film formation on metal substrates, enhancing barrier protection and promoting surface passivation. Its composition is engineered to support electrochemical stabilization in aggressive environments without relying on leachable heavy metals.
Q2: Is CATHAYTHERM GA76 compatible with waterborne coating systems?
A: Yes, it is formulated for good dispersibility and stability in both solvent-based and waterborne protective coatings, including acrylic, epoxy, and polyurethane dispersions. Optimal performance requires appropriate wetting and dispersion protocols during mill-base preparation.
Q3: How does GA76 compare to traditional zinc phosphate pigments in terms of environmental profile?
A: Unlike conventional zinc phosphates, GA76 is designed to be free of regulated heavy metals and halogenated compounds. It aligns with evolving regulatory expectations for sustainable anti-corrosive additives, supporting formulations targeting reduced ecotoxicity and improved end-of-life handling.
Q4: What types of substrates is GA76 most effective on?
A: It delivers robust performance on ferrous metals—including carbon steel and galvanized steel—and shows good adhesion and inhibition on aluminum alloys. Performance on non-ferrous or highly reactive substrates should be verified via application-specific testing.
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E-mail: wangxingqiang@ericwchem.com
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