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|Magnetic properties
|Increase of coercive force [[#text-reference|<sup>*)</sup>]]
|Cobalt-nickel layers on magnetic storage media
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<div id="text-reference">*) Coercive force= force to retaim the adopted magnetisation</div>
To reduce the mechanical wear of thin surface layers on sliding and connector contacts additional lubricants in liquid form are often used. On silver contacts passivation coatings are applied as protection against silver sulfide formation.