The fractional free volumes(FFVs)of the adsorption films formed with different ratios of dipropargyl methoxythiourea imidazoline(DPFTAI)and pyridine quaternary ammonium salt(16BD)were calculated by simulation to deter...The fractional free volumes(FFVs)of the adsorption films formed with different ratios of dipropargyl methoxythiourea imidazoline(DPFTAI)and pyridine quaternary ammonium salt(16BD)were calculated by simulation to determine their synergistic corrosion inhibition effect.The results suggest that the composite corrosion inhibitor at the molar ratio between DPFTAI and 16BD of 4:1 gives the best corrosion inhibition effect.This simulation method to predict the synergistic effect between corrosion inhibitors was further validated by mass loss and electrochemical experiments.This finding delivers valuable understandings of inhibition mechanism of corrosion inhibitors.展开更多
Corrosion inhibition of three imidazoline derivates with different numbers of benzene rings,namely 2-phenyl-1-ethylamino imidazoline(CI-1),2-phenyl-1-ethylamino-1-methylbenzyl quaternary imidazoline(CI-12) and 2-p...Corrosion inhibition of three imidazoline derivates with different numbers of benzene rings,namely 2-phenyl-1-ethylamino imidazoline(CI-1),2-phenyl-1-ethylamino-1-methylbenzyl quaternary imidazoline(CI-12) and 2-phenyl-1-benzoyl ethylamino imidazoline(CI-13),on mild steel in CO2-saturated brine solution was evaluated by mass-loss method and potentiodynamic polarization method.The results show that the three imidazoline derivates can inhibit CO2 corrosion effectively with CI-12 ranking the highest.They mainly restrain the anodic dissolution and act as anodic-type inhibitors.The adsorptions of these derivates on the mild steel surface follow the Langmuir adsorption isothermal equation and belong to chemical adsorption.展开更多
基金Supported by the National Natural Science Foundation of China(No.51471021).
文摘The fractional free volumes(FFVs)of the adsorption films formed with different ratios of dipropargyl methoxythiourea imidazoline(DPFTAI)and pyridine quaternary ammonium salt(16BD)were calculated by simulation to determine their synergistic corrosion inhibition effect.The results suggest that the composite corrosion inhibitor at the molar ratio between DPFTAI and 16BD of 4:1 gives the best corrosion inhibition effect.This simulation method to predict the synergistic effect between corrosion inhibitors was further validated by mass loss and electrochemical experiments.This finding delivers valuable understandings of inhibition mechanism of corrosion inhibitors.
基金Supported by the National Natural Science Foundation of China(No.51171013)
文摘Corrosion inhibition of three imidazoline derivates with different numbers of benzene rings,namely 2-phenyl-1-ethylamino imidazoline(CI-1),2-phenyl-1-ethylamino-1-methylbenzyl quaternary imidazoline(CI-12) and 2-phenyl-1-benzoyl ethylamino imidazoline(CI-13),on mild steel in CO2-saturated brine solution was evaluated by mass-loss method and potentiodynamic polarization method.The results show that the three imidazoline derivates can inhibit CO2 corrosion effectively with CI-12 ranking the highest.They mainly restrain the anodic dissolution and act as anodic-type inhibitors.The adsorptions of these derivates on the mild steel surface follow the Langmuir adsorption isothermal equation and belong to chemical adsorption.