Table 1. Environmental Classes adopted in South Africa(Natural environments only)
(after EN206).
Carbonation-Induced Corrosion.
Designation
Description
XC1 Permanently dry or permanently wet
XC2 Wet, rarely dry
XC3 Moderate humidity (60–80%)
(Ext. concrete sheltered from rain)
XC4 Cyclic wet and dry
Corrosion Induced by Chlorides from Seawater
Designation Description
XS1 Exposed to airborne salt but not in
direct contact with seawater
XS2a* Permanently submerged
XS2b* XS2a + exposed to abrasion
XS3a* Tidal, splash and spray zones
Buried elements in desert areas exposed
to salt spray
XS3b* XS3a + exposed to abrasion
* These sub clauses have been added for South African
coastal conditions.