Abstract
The corrosion inhibition effects of the 2-undecyl-N-carboxymethyl-N-hydroxyethyl imidazoline on simple steels were indagated in 8 wt.% NH2SO3H media using loss of weight and electrochemical methods in conjunction with adsorption and DFT researches. The anti-corrosion effect of UHCI acquired from EIS study is great and the maximum anti-corrosion efficiency could reach 90.15%. The sorption of UHCI on simple steel conforms to the Langmuir sorption equation. The DFT studies reveal that UHCI is firmly chemisorbed upon the simple steel by the Fe…O σ-type dative bonds and isolates the contact between simple steel and NH2SO3H, thus protecting simple steel from the corrosion of NH2SO3H.
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