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Effect of octadecylamine concentration on adsorption on carbon steel surface
Canshuai Liu,Genxian Lin,Yun Sun,Jundong Lu,Jun Fang,Chun Yu,Lisheng Chi,Ke Sun 한국원자력학회 2020 Nuclear Engineering and Technology Vol.52 No.10
Octadecylamine is an effective film-forming amine that protects carbon steel from corrosion. In the present study, the effect of octadecylamine concentration on adsorption on a carbon steel surface was investigated in anaerobic alkaline solution by using SEM/EDS, TEM and the Materials Studio simulation techniques. TEM morphology observation and EDS elemental detection determine the thicknesses of octadecylamine film on a carbon steel surface, which are confirmed by the in-situ electrochemical impedance spectroscopy measurement and resistance calculation. The Materials Studio simulation reveals the number of octadecylamine film layers at different concentrations. Results obtained in this study indicate that adsorption of octadecylamine film on carbon steel proceeds with the multi-layer adsorption mechanism.