SEDL / STP / STP1421-EB / STP10887S

Classification of the Corrosivity of the Atmosphere — Standardized Classification System and Approach for Adjustment

Knotkova, D
convenor of ISO/TC 156/WG 4, senior scientist, SVUOM Ltd., Praha 7,

Kucera, V
senior scientist, SCI, Stockholm,

Dean, SW
senior scientist, Air Products and Chemicals, Inc., Allentown, PA

Boschek, P
senior lecturer, Charles University, Praha 1,

Pages: 16    Published: Jan 2002

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Abstract

Atmospheric corrosivity information is essential for selection of materials of construction, protective coatings and other measures used to prevent corrosion. Standards ISO 9223 - 9226 elaborated in ISO/TC 156/WG 4 are well accepted, used by corrosion engineers and introduced in other normative documents. Work on adjustment of the atmospheric corrosivity classification system is going on in the WG 4 with the aim to cover some gaps in this system. Statistical treatment of the ISOCORRAG program data and other data makes it possible to obtain a better definition of environmental influencies and specification of standard specimens. More sensitive procedures for corrosivity derivation for low aggressive indoor atmospheres have been recommended.