Published July 2021

Datasheet 11: Wet Storage Stain

In circumstances where the galvanized steel becomes damp and is unable to fully dry out, access to atmospheric carbon dioxide may be limited and as a result, conversion to zinc carbonate does not take place.

Wet Storage StainInstead a layer of white powdery zinc corrosion products comprised principally of zinc hydroxide and zinc oxide and known as wet storage stain, is formed. The formation of wet storage stain will continue for as long as the galvanized surface remains damp.

This datasheet offers information on the following:

  • effect of wet storage stain
  • how to avoid wet storage stains
  • how to remove wet storage stains

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