Some Factors Affecting the Corrosion Behavior of Mild Steel in Acidic Solution

Aisha Alturkustani, Reem M Al-Sawat, Reem H. Al-Hassani, Nouf S. Al-Ghamdi, Eman M. Al-Harbi

Abstract


The effect of some factors such as: acid concentration, immersion time, temperature and the presence of inhibitor on the corrosion behaviour of mild steel has been investi­gated using weight loss (ML) and hydrogen evolution (HE) mea­surements. The results obtained show that the corrosion rate for mild steel was found to increase with increasing acid concentration and temperature but it decrease with increasing immersion time and inhibitor concentration. The inhibition efficiency of the corrosion of mild steel by aqueous extract of date seeds was found to vary with concentration, immersion time and temperature. The adsorption of date seeds extract was found to obey Langmuir adsorption isotherm. Scanning electron microscopy (SEM) of mild steel sample is performed to showed adsorption of inhibitor molecules on metal surface. Various thermodynamic parameters were also calculated to investigate the mechanism of corrosion inhibition.


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