Metrological assurance of the research on corrosion characteristics of magnetic nanodispersed lubricants

The paper proposes a new metrological assurance to study functional properties of promising magnetic lubricants: liquids and oils. They contain chemically active components to improve their triboengineering characteristics and therefore cause corrosion of solid surfaces interacting with them. The proposed method for assessing corrosion activity of magnetic lubricants takes into account all conditions of chemical corrosion during friction. A metal filament, in which cyclic electric current and a magnetic field create alternating tension stresses and a temperature similar to the real one in the frictional contact area when using a magnetic fluid tribonode, undergoes corrosion in the magnetic medium. The theoretical justification of the method has two different cases of filament fixation. The nature of the filament movement and its tension under the influence of alternating Ampere's force and alternating sign current pulses is analyzed. There is a diagram of a device for assessing corrosion activity of magnetic lubricant nanodispersed materials. There is a performance evaluation of the proposed method and an experimental research on the effect of corrosive magnetic and non-magnetic lubricating media on a solid copper surface. It is established that the excess of free surfactant in PES-5 organosilicone liquid and its magnetic oil is negative.