A rapid electrochemical corrosion test for a rigid thin-film (TF) magnetic recording disk has been developed. An AC impedance technique is utilized to provide an estimate of the instantaneous corrosion current for a 1 cm/sup 2/ area of the disk surface exposed to an aqueous electrolyte. Results for tests of CoCr TF media exposed to sulfate- and chloride-containing electrolytes are discussed.>
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Walmsley et al. (1988) studied this question.
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