Physicochemical and tribological properties of overbased phenolate lubricating greases were studied in the comparison with analogous sulfonate and alkylsalicylate greases. Overbased components were extracted from the grease model systems and also researched. The scheme and parameters of the real micelles' carbonate nuclei are discussed.
The lubricating properties of model systems based on overbased calcium sulphonate have been studied by sirnudating various kinematic, temperature, and load-speed conditions of fiiction machines as well as by investigating the physical chemistry of friction surfaces. It is found that overbased sulphonate complex grease shows good antifriction, antiwear, and extreme-pressure properties. A synergistic action of calcium tetraborate with overbased sulphonate has been shown. It is found that calcium 12-hydroxystearate, however, has little effect on lubricating properties, but it improves the thixotropic characteristics of a sys tem .
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