The Classification System of ISO 9223 Standard and the Dose
Response Functions Assessing the Corrosivity of Outdoor Atmospheres
A. A. Mikhailov*, J. Tidblad**, and V. Kucera**
* Institute of Physical Chemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia
** Swedish Corrosion Institute, Roslagsvagen 101,
hus 25, SE-104 05 Stockholm, Sweden
Received June 9, 2003
Abstract — The ISO 9223 Standard “Corrosion of Metals and Alloys–Corrosivity of Atmosphere–Classifica-tion” which is now in force was based on the data obtained mainly in thetemperate climate of Europe and North America. At present, it is being revised by using data from new programs of atmospheric tests carried out in cold, temperate, subtropical, and tropical climates. The paper tackles problems of assessing the atmospheric corrosivity from the environmental parameters. A model and dose–response functions characterising the corrosivity of the outdoor atmospheres are described. Suggestible ways of possibly improving the standard with the use of the functions derived are considered.