Corrosion is definitely a concern when packaging and shipping delicate electronic devices or components.  Many electronic components have exposed copper which in the presence of moisture can corrode.  When electrical contact is required, even a slightly corroded copper surface can impede connections.

Desiccants have traditionally been used to protect electronic products over long periods of storage or shipment.  Desiccants will “suck” excess moisture out of the immediate surrounding area and keep the package relatively dry.  This method has proven to be fairly effective, but it has not kept the product corrosion-free in every case.