It defines the conditions in which a wet solid can exert a corrosive action on a metallic material and classifies the factors that influence this corrosion process. It concerns the corrosion of metallic materials surrounded by solids in the presence of humidity, such as for example metal structures sunk into the ground, pipes embedded in concrete, pipes surrounded by insulating material, etc. Corrosion of metallic materials in contact with moist solids is divided into: corrosion by impressed currents (or external currents); spontaneous corrosion, for galvanic microelements and macroelements.
UNI 3668-1968 history
1968UNI 3668-1968 Corrosion of metallic materials. Corrosion conditions and factors for metallic materials in contact with damp solids.