AASHTO R 31-09

This standard practice covers testing criteria for evaluation of protective coating systems for useon iron and steel surfaces. It is not recommended for the evaluation of hot-dip galvanizing ormetalizing.

The protective coating systems are intended for use on bridges, similar structural steel, and otherferrous metal surfaces, both new and existing, prepared by abrasive blast cleaning, which aresubject to corrosive atmospheric environments, such as marine, industrial, deicing chemicals, andhigh humidity.

The values stated in SI units are to be regarded as the standard.

This product replaces:AASHTO R 31-06 - Standard Practice for Evaluation of Coating Systems with Zinc-Rich Primers