CORROSIVITY OF THE ENVIRONMENT – A QUICK GUIDE

 

Corrosivity in Australia as defined in AS/NZS 2312.2 and described in AS 4312
Category Generic examples Specific examples
CX Severe surf shore-line Surf beach shoreline regions with very high salt deposition. Some Newcastle beaches
C5 Surf
Sea-shore
Within 200 m of rough seas & surf beaches.
May be extended inland by prevailing winds & local conditions.
More than 500 m from the coast in some areas of Newcastle
C4 Calm
Sea-shore
From 200 m to 1 km inland in areas with rough seas & surf.
May be extended inland by prevailing winds & local conditions.
All coasts
From the shoreline to 50 m inland around sheltered bays.
In the immediate vicinity of calm salt water such as harbour foreshores.
C3 Coastal From 1 km to 10 km inland along ocean front areas with breaking surf & significant salt spray.
May be extended inland to 50 km by prevailing winds & local conditions.
Metro areas of Perth, Wollongong, Sydney, Brisbane, Newcastle, & the Gold Coast
From 100 m to 3 – 6 km inland for a less sheltered bay or gulf. Adelaide & environs
From 50 m to 1 km inland around sheltered bays. Port Philip Bay & in urban & industrial areas with low pollution levels
C2 Arid/Urban
Inland
Most areas of Australia at least 50 kilometres from the coast. Canberra, Ballarat, Toowoomba & Alice Springs
Inland 3 – 6 km for a less sheltered bay or gulf. Adelaide & environs
Can extend to within 1 km from quiet, sheltered seas. Suburbs of Brisbane, Melbourne, Hobart
C1 Dry indoors Inside heated or air conditioned buildings with clean atmospheres. Commercial buildings