Metal objects corrode and deteriorate when
exposed to moisture and pollutants. Iron and
copper alloy objects are especially vulnerable
and can exhibit active corrosion reactions.
These can develop rapidly and degrade an
object. To slow the process of deterioration
(Museum Handbook 4:14; O:4; 5), house metal
objects below 35% relative humidity (RH).
Metal objects, including those that are actively
corroding, can be stabilized in a dry microclimate.
This Conserve O Gram (COG) provides
guidance on how to create a microclimate storage
box.