Anti-corrosive primer for iron and steel incorporating zinc dust pigment in an inorganic silicate
vehicle. The most common types of inorganic zinc-rich coatings are: (a) post-cured, with waterborne
alkali metal silicate binder; (b) self-cured, with water-borne alkali metal silicate binder; (c)
and self-cured, with solvent-borne alkyl silicate binder. Inorganic zinc-rich coatings require very
good surface preparation (near-white metal or white metal blast cleaning or pickling). They
provide resistance to abrasion, dry heat, immersion in hydrocarbon products, solvents, fresh
water, and pH-neutral aqueous solutions, and exposure in damp, humid environments, and
chemical environments where the pH ranges between 5 and 9

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