کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1260886 971762 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Corrosion inhibition potentials of ampicillin for mild steel in hydrochloric acid solution
ترجمه فارسی عنوان
پتانسیل مهار خوردگی آمپی سیلین برای فولاد خفیف در محلول اسید هیدروکلریک
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
چکیده انگلیسی

Ampicillin [(2S,6R)-6-(2-(aminomethyl)benzamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0) heptanes-2-carboxylic acid], an antibiotic drug was investigated as corrosion inhibitor for mild steel in HCl using gravimetric method. The results obtained showed that various concentrations of ampicillin studied inhibited the corrosion of mild steel in solutions of HCl. The inhibition efficiency increased with increase in the concentrations of ampicillin and decreased with increase in temperature of which the inhibitor of concentration 5 × 10−3 M at 30 °C had the highest inhibition efficiency of 75.85%. Its adsorption was found to be physical, exothermic and spontaneous as confirmed by values of activation energy and free energy of adsorption (around −20 kJ mol−1 for adsorption and below 80 kJ mol−1 for activation energy) and also fitted the Langmuir adsorption model. Quantum chemical calculations results show that ampicillin possesses a number of active centers concentrated mainly on the nitrogen atoms and the neighboring C atoms. The HOMO and LUMO plots of ampicillin further present ampicillin as an effective corrosion inhibitor.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Taibah University for Science - Volume 9, Issue 2, April 2015, Pages 196–202
نویسندگان
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