THE ROLE OF CERIUM IN THE RESISTANCE OF AN MOS2-CONTAINING COMPOSITE BRUSH-PLATING LAYER TO HUMID ATMOSPHERE

MoS2 is an excellent solid lubricant widely used for reducing friction . However, moisture is very harmful to its solid lubrication property because MoS2 is easily oxidized to form Mo6+ and S6+ in a humid atmosp here. In order to improve its oxidation resistance, a study on the rol e of a rare earth element Ce in the resistance of a Ni-Cu-P/Mo-2 brush plating layer to the humid atmosphere was carried out. It was found t hat cerium can effectively stabilize the solid lubrication property of MoS2 due to its preferential adsorption on the surface of MoS2 partic les, the adsorbed layer serving as a barrier to oxidation. This study shows that the rare earth element Ce can be deposited from a water pla ting solution.