Abstract
The corrosion behavior of some low-carbon steels in different concentrations of inhibitor in 0.5 M sulfuric acid solution were studied by potentiodynamic polarization measurements with a scan rate of 1mVs-1 at various temperatures (293–323 ± 1K). It was found that the inhibitor is adsorbed on the steel surface and the experimental results are in agreement with Temkin isotherm. Negative values of the free energy of adsorption were obtained indicating the spontaneity of adsorption process. The formation of insoluble complexes as a result of interaction between metal cations and inhibitor is also discussed and some corrosion parameters such as cathodic Tafel slope, corrosion potential, corrosion current, passivation potential, passivation current, surface coverage and inhibition efficiency were calculated.
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