scope:

This specification covers a one-coat zinc-rich painting system to be used on steel in mild to moderately severe environments.

This system is suitable for use on parts or structures exposed in Environmental Zone 3B (chemical, neutral). It is not recommended for environments where corrosive contaminants will have a pH below 5 or above 9 or severely corrosive environments. The system is recommended as a durable shop primer or as a protective one-coat system for normal atmospheric weathering environments and certain immersion services.

This specification does not pertain to weldable prefabrication zinc-rich primers which are applied at lower thicknesses (25 micrometers [one mil] or less). Further information regarding these and other zinc-rich primers can be found in SSPC-PS Guide 12.00, "Guide to Zinc-Rich Coating Systems."