Study of Corrosion Inhibition and Adsorption Characteristics of "Methyl Carbazodithioate" on Steels in H2SO4 at 20°C A project submitted to the energy and mining engineering faculty in partial fulfillment of the requirement for the degree of bachelor of engineering in the department of materials & corrosion engineering and the department of Chemical engineering
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Date
2020
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جامعة سبها
Abstract
The inhibition of low carbon steels corrosion in " 2.0 M sulphuric acid " solution by a
sulphur containing organic compound namely " MethylCarbozodithoate " as commercially
available inhibitor was studied at temperature " 20 ℃ " by weight loss technique and
adsorption isotherm models. It was found that the tested inhibitor has a promising inhibitory
action against corrosion of low carbon steel in the investigated medium. The inhibition
efficiency was found to increase gradually with a corresponding increasing in the
concentration of the inhibitor. Adsorption isotherms were tested for their relevance to
describe the adsorption behavior of methylcarbozodithoate inhibitor. It was also found
that the methylcarbozodithoate adsorbed well on the steel surface according to most of the
models including; " Langmuir ", " Temkin ", " Freundlch " and " Flory-Huggins " adsorption
isotherm models. Adsorption energies were also determined and discussed. The adsorption
mechanism of methylcarbozodithoate corrosion inhibition is also proposed. A comparison
between methylcarbozodithoate corrosion inhibition at 20 °C and 50 °C has also considered in
our project in order to investigate the effect of inhibitor temperature on the corrosion
behavior. Finally, The obtained results in this work indicates that
methylcarbozodithoate compound is an effective inhibitor for carbon steel in hydrochloric
acid solution specially at those lower temperatures