scope:

This guide provides general information on the description, selection, and application of zinc-rich coatings and the selection of topcoats.

Zinc-rich primers as referenced in this Guide are broadly defi ned as primers containing high levels of zinc such as SSPC-Paint 20 or SSPC-Paint 29.

Zinc-rich coatings are classifi ed as follows:

Type IA Inorganic - post-cured, water-borne, alkalisilicates

Type IB Inorganic - self-cured, water-borne, alkali silicates

Type IC Inorganic - self-cured, solvent-borne, alkyl silicates

Type IIA Organic - thermoplastic binders

Type IIB Organic - thermoset binders

Zinc-rich coatings, both topcoated and untopcoated, have been used successfully in a wide variety of environmental zones. For a detailed breakdown of applicability of various types of zinc-rich coatings in different environmental zones, see Section 4.1 and Table 1.-