The Influence of H+ and Cl- Ions on the Corrosion Inhibitive Effect of Poly(para-aminophenol) for Iron in Hydrochloric acid
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Polymer amines are found to show distinct corrosion inhibition effects in acidic media. The functionalgroups of organic compounds have a wide role in the physical and chemical properties, for the inhibitionefficiency with respect to steric factors, aromaticity, and electron density. The influence of H+ ionsand Cl- ions on the corrosion inhibitive effect of poly(p-aminophenol) for iron in hydrochloric acidwas studied using electrochemical methods such as impedance, linear polarization, and Tafel polarizationtechniques. The experiments were conducted with and without the inhibitor, poly(p-aminophenol). Theconcentration range of H+ ions and Cl- ions are from 1 M to 0.05 M and 1 M to 0.1 M, respectively. With the inhibitor poly(p-aminophenol), this study shows that inhibition efficiency decreases with thereduction of H+ ion and Cl- ion concentrations in aqueous solution. Further, it reveals that the adsorptionof an inhibitor on the surface of iron is dependent on the concentrations of H+ and Cl- ions in thesolution and the adsorption of inhibitor on the iron surface through the cationic form of amine.
Abstract
Polymer amines are found to show distinct corrosion inhibition effects in acidic media. The functionalgroups of organic compounds have a wide role in the physical and chemical properties, for the inhibitionefficiency with respect to steric factors, aromaticity, and electron density. The influence of H+ ionsand Cl- ions on the corrosion inhibitive effect of poly(p-aminophenol) for iron in hydrochloric acidwas studied using electrochemical methods such as impedance, linear polarization, and Tafel polarizationtechniques. The experiments were conducted with and without the inhibitor, poly(p-aminophenol). Theconcentration range of H+ ions and Cl- ions are from 1 M to 0.05 M and 1 M to 0.1 M, respectively. With the inhibitor poly(p-aminophenol), this study shows that inhibition efficiency decreases with thereduction of H+ ion and Cl- ion concentrations in aqueous solution. Further, it reveals that the adsorptionof an inhibitor on the surface of iron is dependent on the concentrations of H+ and Cl- ions in thesolution and the adsorption of inhibitor on the iron surface through the cationic form of amine.
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