Smithells Metals Reference Book, 7th Edn., has a bit of info.
Table 25.1 has static friction data for very clean pure metals (self-mated) in both vacuum and in air. Cobalt was lowest for each condition, e.g., 0.3 in air vs. 0.4 for chromium, which was next lowest.
Figure 25.2 ‘Tendency of metal couples to adhere together’ ranks pairs of 19 different metals from 1 – least adhesion, best wear resistance to 4 – most adhesion, worst wear. For most combinations, Co is about the same as Cr, Ni & Fe. It is slightly better vs. Al, Au, In & Ti. Worse than Cr vs. Cu, Sn & Zr.
Adhesion is greatest for those metals sharing the same crystal structure and/or forming intermetallics. Also, the thickness of the surface oxide matters – stainless steels and nickel-base alloys having very thin films, do not have good adhesive wear resistance and can gall. As the chemistry of Co is similar to that of Ni, similar behavior is likely.
A search for galling resistance may help.
You might also try suppliers of Co plating chemicals as to the deposit properties.