DIN EN ISO 9224:2012-05

This International Standard specifies guiding values of corrosion attack for metals and alloys exposed to natural outdoor atmospheres for exposures greater than one year. This International Standard is intended to be used in conjunction with ISO 9223. Guiding corrosion values for standard structural materials can be used for engineering calculations. The guiding corrosion values specify the technical content of each of the individual corrosivity categories for these standard metals. Annex A provides examples of calculated maximum corrosion attack after extended exposure (up to 20 years) for six standardized corrosivity categories. Annex B provides presumed average initial and steady-state corrosion rates of standard metals in intervals relative to six standardized corrosivity categories. Annex C provides the calculation procedure for corrosion attack of steels in regard to their composition. This document (EN ISO 9224:2012) has been prepared by ISO/TC 156 "Corrosion of metals and alloys" (secretariat: SAC, People's Republic of China) and has been adopted within the framework of the Vienna Agreement by CEN/TC 262 "Metallic and other inorganic coatings" (secretariat: BSI, United Kingdom). The responsible German committee is Working Committee NA 062-01-71 AA "Korrosion und Korrosionsschutz" ("Corrosion and corrosion protection") at the Materials Testing Standards Committee (NMP).