Olive leaf as green corrosion inhibitor for C-steel in Sulfamic acid solution

The effect of Olive leaf as a corrosion inhibitor for C-steel in 10% Sulfamic acid (NH2SO3H) solution was tested utilizing different techniques. The effect of temperature (298-328 K) was determined and activation and adsorption thermodynamic parameters were counted and discussed. The surface morphology was analyzed utilizing a scanning electron microscope (SEM). Potentiodynamic polarization procedures evidenced that Olive leaf acts as mixed-type inhibitor for corrosion of C-steel in 10% NH2SO3H solution. The addition of Olive leaf produces an increase in the charge transfer resistance (R-ct) and reduction in capacitance of the double layer (C-dl). The inhibition mechanism involves physisorption. The adsorption of this extract on C-steel surface follows Langmuir isotherm. All the studied techniques gave similar results. [GRAPHICS] .