Inhibition Behavior of An Imidazoline Derivative for Carbon Steel Corrosion in Desalted-water
The inhibition behavior of an imidazoline derivative as an organic corrosion inhibitor for carbon steel in desalted water was investigated by means of coupon tests and weight loss method.The results obtained confirm that this imidazoline derivative can significantly reduce the corrosion rate of carbon steel in desalted water within the studied temperatures.The minimum fully-practical concentration of this corrosion inhibitor is 60mg/L for 20# carbon steel in the desalted-water without deoxygenation at temperatures not over 60℃; in 40℃ and 60℃ desalted-water without deoxygenation but with enough inhibitor content,the increase of pH had no obvious effect on the anti-corrosion performance; Cl-and SO4 2-both affected the performance of this imidazoline inhibitor,which tended to be more significant with the increasing concentration within a certain range; according to the Langmuir isotherm,the corrosion inhibition of carbon steel by this inhibitor occurs through chemisorption of inhibitor molecules on the active sites,which leads to the formation of a passive layer on the metal surface which separates the metal from direct contact with the corrosive medium and hence keeps the interface in a passive state.
imidazoline desalted water carbon steel corrosion inhibitor chemisorption
Zhang Yu Xie Xuejun
Water Quality Engineering Department,School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,PR China
国内会议
武汉
英文
11-22
2017-12-09（万方平台首次上网日期，不代表论文的发表时间）