Dissimilar Metals.

eliminated by the use of microcrystalline waxes on the

subject to galvanic corrosion, when an aluminum

surface passes over another aluminum surface, there is

sliding surfaces and teflon-coated aluminum pistons and

tubes. Teflon coatings and wax finishes also serve to

it tendency for the surfaces to gill. Galling also occurs

when a cadmium surface rubs against another cadmium

reduce friction between sliding members of propellant

actuated devices.

surface, as a cadmium plated piston sliding (stroking)

through a cadmium-plated bushing.

Galling is