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High-efficiency cathodic protection via zinc-rich electrochemical action.
Excellent dispersion stability in epoxy, polyurethane, and alkyd resin systems.
Low heavy metal content, compliant with RoHS and REACH restricted substance requirements.
Enhanced barrier protection through optimized particle morphology and surface passivation.
Improved film integrity and reduced porosity compared to conventional zinc phosphate pigments.
Marine and offshore structural coatings (e.g., hulls, decks, ballast tanks).
Industrial maintenance coatings for steel bridges and power transmission towers.
Oil & gas infrastructure coatings including pipelines and storage tanks.
Railway vehicle undercarriage and chassis primers.
Heavy-duty equipment coatings for mining and construction machinery.
| Chemical Type | Zinc calcium phosphosilicate complex |
| Product Form | Fine dry powder |
| Appearance | Off-white to light gray free-flowing powder |
| Primary Applications | Anti-corrosive primer pigments for protective coatings |
| Key Features | Non-toxic, non-chromate, low-VOC compatible |
| Benefits | Extended service life, reduced maintenance frequency, improved adhesion |
| Storage Conditions | Keep in cool, dry place; protect from moisture and direct sunlight |
| Shelf Life | 24 months from date of manufacture under recommended storage |
Q1: What is the primary corrosion inhibition mechanism of SHIELDEX C303?
A: SHIELDEX C303 functions primarily through passive film formation on metal substrates, promoting the development of stable, protective oxide layers. Its active components interact with ferrous surfaces to enhance barrier properties and reduce electrochemical corrosion activity in both primers and mid-coats.
Q2: Is SHIELDEX C303 compatible with waterborne coating systems?
A: Yes, SHIELDEX C303 is specifically engineered for compatibility with a broad range of waterborne acrylic, epoxy, and hybrid resin systems. It demonstrates good dispersion stability and minimal impact on rheology or storage life when properly incorporated using standard wetting and stabilization protocols.
Q3: How does SHIELDEX C303 compare to traditional zinc phosphate pigments in terms of environmental profile?
A: Unlike conventional zinc phosphate, SHIELDEX C303 is formulated without heavy metals such as zinc, lead, or chromium, supporting compliance with evolving global restrictions on hazardous substances. It aligns with industry trends toward low-VOC, non-toxic alternatives while maintaining robust anti-corrosive performance in demanding industrial environments.
Q4: What types of substrates is SHIELDEX C303 most effective on?
A: SHIELDEX C303 delivers optimal performance on ferrous metals—including carbon steel, galvanized steel, and cast iron—particularly in atmospheric and mildly aggressive exposure conditions. It is widely used in protective coatings for infrastructure, machinery, and marine-adjacent applications where long-term adhesion and underfilm corrosion resistance are critical.
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E-mail: wangxingqiang@ericwchem.com
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