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Applying AC impedance electrochemical methods to corrosion testing cobalt alloy media

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3 Author(s)
R. G. Walmsley ; Hewlett-Packard Lab., Palo Alto, CA, USA ; B. R. Natarajan ; D. Wong

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 cm2 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

Published in:

IEEE Transactions on Magnetics  (Volume:24 ,  Issue: 6 )