In what environments does weathering steel need protection from corrosion?

Environment in which weathering steel need protection:

Corrosion occurs because of water or moisture in the atmosphere. If the steel is attacked by corrosion there is a possibility that steel gets damaged and it will affect the structure badly as it decrease the strength which is responsible for damaging the structure. So, protection is needed for this weathering steel for protecting from

corrosion.

Environments where protection is required are

1. Humid environments
2. Cold environments
3. Moist environments
4. In areas where rain fall occurs frequently
5. In areas where there is snow or snow fall takes place etc