Corrosivity categories
|
Corrosivity
category1) |
Examples of typical environments in a temperate climate | |
| Exterior | Interior | |
|
C1 (very low) |
– | Heated buildings with clean atmospheres, e.g. offices, shops, schools, hotels. |
|
C2 (low) |
Atmospheres with low levels of pollution. Typically inland rural areas. | Unheated buildings where condensation may occur, e.g. depots, sport halls. |
|
C3 (medium) |
Urban and industrial atmospheres with moderate levels of sulphur dioxide. Coastal areas with low salinity. | Production rooms with high humidity and some air pollution, e.g. food-processing plants, laundries, breweries, dairies. |
|
C4 (high) |
Industrial and coastal areas with moderate salinity. | Chemical plants, swimming pools, coastal ship- and boatyards. |
|
C5-1 (very high, industrial) |
Industrial areas with high humidity and aggressive atmosphere. | Buildings or areas with almost permanent condensation and with high pollution. |
|
C5-M (very high, marine) |
Coastal and offshore areas with high salinity.2) | Buildings or areas with almost permanent condensation and with high pollution. |
-
1)
In accordance with ISO 12944-2:1998.
- 2) In hot, humid coastal areas, the mass loss or thickness loss can exceed the limits of category C5-M and special precautions should be taken when selecting protective paint systems.
