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

Abstract

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 ΔG˚, ΔH˚, and ΔS˚, 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.

Synthesis and characterization of polyaniline–hydrotalcite–graphene oxide composite and application in polyurethane coating

“…[1][2][3] Green corrosion inhibitors are worthy candidates because they have high efficiency, and are less or not harmful to the environment or human beings. [4][5][6][7][8] Green corrosion inhibitors are biodegradable and naturally-occurring substances. According to their chemical nature, they can be classied into two broad categories: organic green inhibitors and inorganic green inhibitors.…”

“…When used, the inhibitor's molecules will be released into the coating to inhibit corrosion. [7][8][9][10][11] The vanadate ion has been intercalated into the double-layered structure of HT via an anion exchange mechanism, and HT-V was then used in an organic coating to protect the aluminium alloy. 16 The inhibitive effect of HT-V can be compared with highly effective chromate inhibitors.…”