Protective action of lubricating oils

Conclusions It has been shown that motor oils do not protect ferrous or nonferrous metals from electrochemical corrosion. Preservative or operational-preservative oils, on the other hand, are capable of protecting metals even under conditions of aggressive media and long exposure periods. Potential corrosivity of these oils has been determined by taking polarization curves from aqueous extracts of the original and oxidized oils.It has been shown that oils giving aqueous extracts capable of retarding the development of electrochemical corrosion will have good protective properties even without the inclusion of special-purpose inhibitors in these oils.Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 5, pp. 49–52, May, 1970.