Launaea Resedifoliaفي وسطين حمضيين لمستخلص النبات الصحراويxc52دراسة الفعالية المضادة لتأكل القولاذ الكربوني
Résumé: This work aims to study the anti-corrosion activity of carbon steel (XC52) in two acid media (HCl, 1M), (H2SO4, 0.5M), of the aqueous extract of the desert plant LaunaeaResedifolia located in the south-west of Algeria exactly in the city of Béchar, by applying the weight loss method and by studying the effect of temperature and by applying the Arrhenuis equation to calculate the thermodynamic quantities. The results showed that the presence of the aqueous extract in the corrosive medium leads to a decrease in the rate of corrosion of the steel, since the rate of inhibition increases with the increase in the concentration of the extract in the medium. The highest yield was 58.2821% at a concentration of 35ppm in the acid medium HCl and a percentage of 74.5965314 at a concentration of 60ppm in the acid medium H2SO4, and the study of the adsorption mechanism of the extracted from the steel surface proved that the actual adsorption is subjected to the Langmer and Tamkeen isotherm in HCl acid medium and subjected to the Tamkeen and Fromkin isotherm in H2SO4 acid medium and it was also shown that there is a relationship inverse between temperature change and percentage inhibition.
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