What is aluminium discolourisation or water staining?

If water is present on aluminium and it becomes trapped between wraps, sheets or other packaging material with no air flow to remove it, the prolonged contact between the water and the metal causes a chemical reaction which results in water stain.

This can present as white marks or dark staining and can happen in a relatively short time, so it is very important that you act immediately should you notice any moisture on or around your aluminium.

Discolourisation of aluminium from contact with moisture

For more information visit our article, “How to prevent aluminium discolourisation”¬†and “How to clean aluminium staining”.