UNI EN ISO 9224 : 2012

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Prediction of corrosion attack after
  extended exposure
6 Specific criteria for calculation of
  corrosion rates of structural metals
7 Long-term exposures
Annex A (informative) - Example of maximum
        corrosion attack after extended exposures
        for corrosivity categories
Annex B (informative) - Average initial corrosion
        rates and average steady corrosion rates in
        intervals relative to classified corrosivity
        categories
Annex C (informative) - Prediction of corrosion attack
        of steels with regard to steel composition
Bibliography

Describes guiding values of corrosion attack for metals and alloys exposed to natural outdoor atmospheres for exposures greater than one year.