Application of Metal Self-Repairing Additives on Cylinder-Piston Ring Rubbing Pairs

The metal self-repairing additives can be used in situ auto-repair worn surface of the long-term running machine parts. The basic composition of the metal self-repairing additives was magnesium silicate hydroxide of empirical formula [Mg-6(Si4O10)(OH)(8)]. The auxiliary components were metallurgical activator and deoxidizer. And this metal self-repairing was applied to a dredger named "HJ18". The effects of the application were analyzed by spectra analysis. The spectral data showed that the running conditions which included running time and lubrication volume, etc had great impact on the formation of the auto-restoration layer. Laboratory experiment showed that there were a series of chemical and physical changes occurred when the magnesium silicate hydroxide of empirical formula [Mg6(Si4O10)(OH)(8)] was added into the oil in given conditions, then a certain thickness smooth layer was formed on abrasion surface. Keywords: Lubrication, metal self-repairing additive, magnesium silicate hydrate, dredger