The effect of temperature on physicochemical properties and corrosion activity of deep eutectic solvents Ethaline and Reline to the mild steel

In our work we received a systematic data on the physicochemical properties and corrosive activity of Ethaline and Reline. Density, electrical conductivity and viscosity depending on the temperature of the ionic liquids were obtained and characterized. It was shown that an increase in temperature leads to a decrease in the density and viscosity of solutions that can be explained by increased mobility of ions and molecules of compounds due to destruction of hydrogen bonds between them. It should be noted that in the investigated temperature range the conductivity value of the solution Ethaline significantly higher than the corresponding values for the solution Reline, which is the result of interaction of various components of ionic liquids and differences in the size of their positions. The basic laws of corrosion destruction of structural steels in these DES were established. It was shown that Ethaline is more corrosive to mild steel as compared with Reline.