Toward an understanding of overcoat corrosion protection

This paper presents detailed electrochemical investigations on the role of overcoat and lubricant in head and media corrosion protection. Depending on the types of metal to be protected, some types of overcoat materials can actually accelerate corrosion due to galvanic coupling effect. To eliminate...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2003-09, Vol.39 (5), p.2450-2452
Main Authors: Qing Dai, Yen, B.K., White, R.L., Peterson, P.J., Marchon, B.
Format: Article
Language:English
Subjects:
Amorphous materials
Applied sciences
Cobalt alloys
Conductivity
Corrosion
Dielectric materials
Electrodes
Electronics
Exact sciences and technology
Galvanizing
Lubricants
Magnetic and optical mass memories
Magnetism
Other magnetic recording and storage devices (including tapes, disks, and drums)
Protection
Silicon compounds
Storage and reproduction of information
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Summary:This paper presents detailed electrochemical investigations on the role of overcoat and lubricant in head and media corrosion protection. Depending on the types of metal to be protected, some types of overcoat materials can actually accelerate corrosion due to galvanic coupling effect. To eliminate such coupling, a true dielectric film needs to be used instead of the conventional hydrogenated carbon films. On the other hand, galvanic coupling is not always detrimental depending on the types of materials to be protected.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2003.816434