Abstract
A watts type cobalt bath containing additives has been used to obtain CoP (1–3 wt-%P) coatings using galvanostatic pulse plating (PP). These CoP alloys, with a nanocrystalline hexagonal close packed (hcp) structure, are a valuable candidate for hard chromium (HC) replacement. The morphology, structure and performance of CoP and HC films were characterised using scanning electron microscopy (SEM), atomic force microscopy (AFM), XRD, microindentation, abrasion, friction and corrosion tests.
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