In this proceeding. the compositions of the T-30 turbine oil with liquid rubber. Co. Ni. Zn. Mg and Ba salts of the natural petroleum acids (NPA) boiling in the range 220–340°C and nitro compounds which are produced on the basis of C14H28 α-olefins have been investigated in different ratio and contents as metalworking fluids (MWF). The physical and chemical properties of the produced compositions have been studied. and the morphology of inhibited carbon steel surface was analyzed and characterized by using Fourier transform infrared (FTIR) and scanning electron microscopy (SEM) techniques. The effect of the temperature on the inhibition efficiency and thermodynamic parameters have also been reported. The thermal analyzer was used for the thermogravimetric analysis (TG/DTA) of the prepared MWF. The experiments have been operated with different concentrations of the inhibitor on the steel plates in condensation and environment phases in the experiment chamber.

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