Abstract
Cobalt—Nickel 80:20 alloy thin films suitable for magnetic data storage were protected against atmospheric corrosion by the application of a plasma polymerized protective layer onto the exposed surface of the Co4Ni film. Coatings were deposited in a custom built reactor onto moving substrate comprising the magnetic thin film on polyester web. Smooth plasma polymer films were obtained from several monomers. Corrosion testing by incubation at 60°C and 90% humidity showed that the plasma polymer overcoat prevented the rapid tarnishing occurring with unprotected Co4Ni films. Optical microscopy demonstrated absence of localized corrosion spots, indicating that the plasma polymer films were pinhole free. The progress of corrosion was monitored by optical absorption spectroscopy; as corrosion produced an increase in the transmission of light through the semi-opaque films, the extent of the corrosive attack could be quantified by measuring the decrease in optical density of the thin magnetic alloy layer. Protection by plasma polymer overcoats of organosiloxane composition produced a substantial reduction in the rate of corrosion of Co4Ni films.
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References
H. Sugaya and A. Tomago, in “Proc. Symp. Magnetic Media and Manufacturing Methods”, Hawaii, May 1983.
T.C. Arnoldussen and E.M. Rossi, Ann. Rev. Mater. Sci. 15, 379 (1985).
A. Feuerstein, H. Lammermann, M. Mayr and H. Ranke, Vacuum 35, 277 (1985).
J.S. Gau, R.G. Spahn and D. Majumdar, IEEE Trans. Magn. MAG-22, 582 (1986).
R.R. Dubin, K.D. Winn, L.P. Davis and R.A. Cutler, J. Appl. Phys. 53, 2579 (1982).
N.G. Farr and H.J. Griesser, Mater. Forum, accepted for publication (1988).
N.G. Farr, H.J. Griesser, A.E. Hughes and B.A. Sexton, in preparation.
M. Shen and A.T. Bell, Editors, “Plasma Polymerization”, ACS Symp. Ser., 108, American Chemical Society, Washington (1979); H. Yasuda, “Plasma Polymerization”, Academic Press, Orlando (1985).
E. Sacher, J.R. Susko, J.E. Klemberg-Sapieha, H.P. Schreiber and M.R. Wertheimer, Amer. Chem. Soc. Coat. Appl. Polym. Sci. Proc. 47, 43 9 (1982).
H.P. Schreiber, M.R. Wertheimer and A.M. Wrobel, Thin Solid Films 72, 487 (1980).
K. Harada, J. Appl. Polym. Sci. 26, 3707 (1981).
M.R. Wertheimer, J.E. Klemberg-Sapieha and H.P. Schreiber, Thin Solid Films 115, 109 (1984).
W.O. Freitag, H. Yasuda and A.K. Sharma, J. Appl. Polym. Sci.: Appl. Polym. Symp. 38, 185 (1984).
D.L. Cho and H. Yasuda, Polym. Mater. Sci. Eng. 56, 599 (1987).
J.A. van Lier and R.E. Ray, Polym. Mater. Sci. Eng. 56, 603 (1987).
H.J. Griesser, Vacuum, in press (1988).
H.J. Griesser and L.P. Bennett, Mater. Forum, in press (1988).
I.H. Coopes and H.J. Griesser, J. Appl. Polym. Sci., in press (1988).
S.P. Swann and S. Srinivasan, Amer. Chem. Soc. Polym. Prepr. 28, 194 (1987).
N. Inagaki and H. Yamazaki, J. Appl. Polym. Sci. 29, 1369 (1984).
H. Yasuda, T. Hirotsu and H.G. Olf, J. Appl. Polym. Sci. 21, 3179 (1977).
H.F. Winters, R.P.H. Chang, C.J. Mogab, J. Evans, J.A. Thornton and H. Yasuda, Mater. Sci. Eng. 70, 53 (1985).
M. Yamamoto, J. Sakata and M. Hirai, J. Appl. Polym. Sci. 29, 2981 (1984).
D.R. Knapp, “Handbook of Analytical Derivatization Reactions”, p. 8, Wiley-Interscience, New York (1979).
M.L. White, Proc. IEEE 57, 1610 (1969).
P.R. Troyk, M.J. Watson and J.J. Poyezdala, in “Polymeric Materials for Corrosion Control”, R.A. Dickie and F.L. Floyd, Editors, ACS Symp. Ser. 322, 299, American Chemical Society, Washington (1986).
A.K. Hays and D.M. Haaland, Amer. Chem. Soc. Org. Coat. Appl. Polym. Sci. Proc. 47, 383 (1982).
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© 1989 Plenum Press, New York
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Grlesser, H.J. (1989). Plasma Polymer Films for Corrosion Protection of Cobalt-Nickel 80:20 Magnetic Thin Films. In: Mittal, K.L. (eds) Polymers in Information Storage Technology. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0843-0_27
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DOI: https://doi.org/10.1007/978-1-4613-0843-0_27
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