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- W2062202443 abstract "Abstract The inhibition efficiency of Tryptophan (Trp) has been studied for the corrosion of low alloy steel ASTM A213 grade T22 in sulfamic (HSO 3 NH 2 ) and hydrochloric (HCl) acid solutions. Corrosion inhibition was studied using electrochemical methods (electrochemical impedance spectroscopy; EIS and the new technique electrochemical frequency modulation; EFM) and weight loss measurements. The influence of inhibitor concentration, solution temperature, and immersion time on the corrosion resistance of low alloy steel (LAS) has been investigated. Trp proved to be a very good inhibitor for low alloy steel acid corrosion. EFM measurements showed that Trp is a mixed type inhibitor. Trp behaved better in 0.6 M HCl than in 0.6 M HSO 3 NH 2 . Moreover, it was found that the inhibition efficiency increased with increasing inhibitor concentration, while a decrease was detected with the rise of temperature and immersion time. The associated activation energy ( E a ) has been determined. The values of E a indicate that the type of adsorption of Trp on the steel surface in both acids belongs to physical adsorption. The adsorption process was tested using Temkin adsorption isotherm." @default.
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- W2062202443 date "2017-02-01" @default.
- W2062202443 modified "2023-10-15" @default.
- W2062202443 title "Adsorption and inhibitive properties of Tryptophan on low alloy steel corrosion in acidic media" @default.
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- W2062202443 doi "https://doi.org/10.1016/j.arabjc.2013.02.010" @default.
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