Zinc-rich primers protect by the sacrificial anode action of zinc dust on the steel substrate: where the coating is locally damaged, zinc corrodes preferentially and thereby protects the steel — this is what distinguishes them from ordinary anti-rust primers. By resin system there are two main classes — epoxy zinc-rich primers offer good adhesion and high application tolerance and are the mainstream choice for offshore projects, bridges and storage tanks; inorganic zinc silicate primers withstand temperatures up to 400°C and above and provide strong solvent resistance, and are mostly used for high-temperature pipelines, tank interiors and locations requiring subsequent welding and cutting. Selection covers three key indicators: zinc dust content in the dry film (determining sacrificial anode capacity), volume solids (determining film build per coat and VOC), and the type of matching topcoat. In application, inorganic zinc silicate requires a sufficient surface preparation grade and specific curing conditions (moisture-triggered curing), otherwise adhesion problems occur. This page compiles OEM technical data for zinc-rich primers from various brands.
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Information is subject to the manufacturer's latest version; original technical documents may be updated from time to time. For the latest version or models not listed,Contact Us.
This page compiles original-factory technical data sheets by tag. The same model may appear under several tags at once (for example, a water-borne epoxy primer belongs to "water-borne", "epoxy" and "primer"), the more entry points a model has, the more easily it is found by search habits. For selection advice, coating systems or quotations, contactContact Us.
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