Inhibition effect of fatty amides with secondary compound on carbon steel corrosion in hydrodynamic condition

3rd International Conference on Chemical Engineering Sciences and Applications 2017

Ibrahim, I.M.^1 ; Jai, J.^1 ; Daud, M.^2 ; Hashim, Md A.^1

Faculty of Chemical Engineering, Universiti Teknologi MARA (UiTM), Selangor, Shah Alam

40450, Malaysia^1

Industrial Technology Division, Malaysian Nuclear Agency (Nuclear Malaysia), Bangi, Kajang Selangor

43000, Malaysia^2

关键词: Electrochemical measurements;    Energy dispersive X ray spectroscopy;    Hydrodynamic conditions;    Linear polarization resistance;    Polarization resistances;    Rotating cylinder electrodes;    Sodium chloride solution;    Synergistic inhibition;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/334/1/012048/pdf
DOI  :  10.1088/1757-899X/334/1/012048

来源: IOP

【 摘 要 】

The inhibition effect demonstrates an increase in the inhibition performance in presence of a secondary compound in the inhibited solution. This study introduces fatty amides as corrosion inhibitor and oxygen scavenger, namely, sodium sulphite as a secondary compound. The main objective is to determine the synergistic inhibition effect of a system by using fatty amides together with sodium sulphite in hydrodynamic condition. The synergistic inhibition of fatty amides and sodium sulphite on corrosion of carbon steel in 3.5 wt% sodium chloride solution had been studied using linear polarization resistance method and scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (EDX). Electrochemical measurement was carried out using rotating cylinder electrode at different flow regimes (static, laminar, transition and turbulent). Linear polarization resistance experiments showed the changes in polarization resistance when the rotation speed increased. It found that, by addition of fatty amides together with sodium sulphite in test solution, the inhibition efficiency increased when rotation speed increased. The results collected from LPR experiment correlated with results from SEM-EDX. The results showed inhibition efficiency of system was enhanced when fatty amides and oxygen scavengers were present together.