Tribological Properties of the Overbased Calcium Sulfonate Complex Greases
The commercial greases for bearing applications should meet the requirements of the severe conditions of use (high load, low friction and low noise etc.). A kind of overbased calcium sulfonate complex greases was evaluated using an UMT-II friction tester, the commercial lithium greases as reference. The morphologies of the worn surfaces were observed using a scanning electron microscope (SEM). The results show that the overbased calcium sulfonate complex greases have stable friction coefficients as low as 0.090-0.094. At the same time, the overbased calcium sulfonate complex greases exhibited higher wear resistance than that of commercial lithium greases.
Z. Z. Wen et al., "Tribological Properties of the Overbased Calcium Sulfonate Complex Greases", Applied Mechanics and Materials, Vols. 130-134, pp. 891-894, 2012