Title :
Applying AC impedance electrochemical methods to corrosion testing cobalt alloy media
Author :
Walmsley, R.G. ; Natarajan, B.R. ; Wong, D.
Author_Institution :
Hewlett-Packard Lab., Palo Alto, CA, USA
fDate :
11/1/1988 12:00:00 AM
Abstract :
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
Keywords :
chromium alloys; cobalt alloys; corrosion testing; electric impedance measurement; hard discs; AC impedance electrochemical methods; CoCr; aqueous electrolyte; corrosion testing; instantaneous corrosion current; magnetic recording disk; rigid disk; Cobalt alloys; Corrosion; Drives; Humidity; Life estimation; Oxidation; Surface impedance; Temperature; Testing; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
