The use of zinc in corrosion-protective coatings is due to its higher galvanic activity relative to that of steel. Pure zinc dust provides the best sacrificial protection to steel in a galvanic couple. Zinc-rich coatings can be subcategorized according to the type of binder material used, namely, inorganic and organic zinc-rich coatings. Common inorganic binders such as post-cured water-based alkali metal silicates, self-cured water-based alkali metal silicates, and self-cured solvent-based alkyl silicates, are reviewed. The article also compares inorganic and organic zinc-rich coatings, and discusses the concerns regarding zinc-rich coatings.
Kenneth B. Tator, Zinc-Rich Coatings, Protective Organic Coatings, Vol 5B, ASM Handbook, Edited By Kenneth B. Tator, ASM International, 2015, p 213–220, https://doi.org/10.31399/asm.hb.v05b.a0006049
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