SSPC PS Guide 12.00 Guide to Zinc-Rich Coating Systems

 
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 defined as primers containing high levels of zinc, such as SSPC-Paint 20 or SSPC-Paint 29.

Zinc-rich coatings are classified as follows:

# Type IA Inorganic _ post-cured, water-borne, alkali-silicates
# 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. A detailed breakdown of applicability of various types of zinc-rich coatings in different environmental zones is provided.