Wet Storage Damage

Close stacked sheets may deteriorate quickly if water enters the pack. This happens because the metal exposed to moisture without air forms bulky, unstable, and loosely adherent, hygroscopic compounds. See Crevice Corrosion/Wet Storage Stain.

Water can infiltrate deeply into a bundle of close-stacked sheets.  The extent and severity of wet storage stain is usually proportional to the length of time the sheeting has been wet, however the time to onset can be very variable, and occur more rapidly in warm conditions. 

Sheets can be dried by filleting sheets or cross stacking them on a slope to allow water to drain and air to circulate between the sheets.  Only use a dry, well-ventilated environment for long term storage.

Revision Category: 
3 - Substantial change to recommendation
Revision Detail: 

This clause has been reviewed as part of a substantial revision of COP Clause 14. Installation.