Corrosion Inhibition Properties of Norepinephrine Molecules on Mild Steel in Acidic Media

• 作者: Ahmed Yahya Issa Rubaye Ali Abdulrazzaq Abdulwahid Hassan Thamir Abdulsahib
• 来源期刊: 封装与吸附期刊(英文)
• 学科: 化学
• 关键词: Corrosion Inhibition Adsorption Efficiency LANGMUIR ISOTHERM THERMODYNAMIC Parameters Scanning Electron MICROSCOPY (SEM)
• 年，卷（期）: 2015,（3）
• 页码范围: 155-164
• 页数: 10页
• 分类号: O6

摘要

Inhibition performance of norepinephrine was investigated as corrosion inhibitors by Gravimetric technique and carried out with mild steel samples in 1 M hydrochloric acid solution at room temperature. Norepinephrine exhibited maximum efficiency of 79% at 500 mg/L. The results of Gravimetric studies revealed that the investigated compound acted as good corrosion inhibitor and the inhibition efficiencies increased with increase in the concentrations of the inhibitor IC. The experimental data complied with the Langmuir adsorption isotherm. Thermodynamic parameters, such as ΔGo, ΔHo, and ΔSo, were calculated using adsorption equilibrium constant obtained from the Langmuir isotherm. Results suggested that the norepinephrine adsorption on mild steel surface was a spontaneous and exothermic process. Scanning electron microscopy was used to investigate the mild steel surface at the highest corrosion inhibition studied concentration.