Abstract
The tribological behavior of electrodeposited Zn–Ni alloy coatings was investigated for its suitability to replace Zn- and Cd-based coatings. An in situ tribometry technique with a transparent sapphire hemisphere as a counter face on a pin on flat tribometer was utilized to examine the contribution of third bodies in friction and wear behavior. Wear mechanisms and tribo/transfer film morphology were also studied with the X-ray diffraction and electron microscopy. In situ tribometry and additional ex situ analyses revealed that Zn–Ni coatings had superior resistance to adhesive wear compared to cadmium coatings. Microhardness of Zn–Ni coatings was higher than Zn and Cd coatings. Hardness on the wear track of Zn–Ni coatings showed the formation of a strain hardened tribo layer.
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