Affects of adsorbed films on galvanic corrosion in metallic thin film media

Recorded data, developed as Bitter paterns, were used to observe the progress of cobalt nickel alloy corrosion under its protective rhodium overcoat. Inhibition of galvanic corrosion by adsorbed organic molecules was demonstrated as a cure for a practical manufacturing problem. The benificial aspects of organic molecules adsorbed from the vapor state was demonstrated by use of a disk drive in a vapor chamber. The practical aspects of the resulting frictional polymer was noted. The implication of these phenomona to disk media corrosion studies is discussed.