Imidazoline, which is known as one of the active ingredients of corrosion inhibitors, is used in a lot of oil and gas facilities in order to mitigate corrosion problems. However, it is easily hydrolyzed to amide, which leads to the change of inhibitor efficiency. Therefore, the inhibitor efficiency of imidazoline-type and amide-type inhibitors was evaluated by several tests such as electrochemical measurements, weight loss test and quartz crystal microbalance measurement. Furthermore, the effect of one intensifier for corrosion inhibitor was also evaluated by the same tests.

As a result, the large difference of inhibitor efficiency between the imidazoline-type and amide-type inhibitor was not observed by the electrochemical measurements. On the other hand, the weight loss test under turbulent flow indicated that imidazoline-type inhibitor performed higher inhibitor efficiency than that of the amide-type. This intensifier improved the inhibitor efficiency of both types.

Subject
Steel surfaces, Inhibitor performance, Adsorption, Imidazolines, Solutions, Chemical inhibition, Weight loss, Amide, Weight loss analysis, Corrosion inhibitors, Cathodic inhibitors, Corrosion potential, Anodic inhibitors
Keywords:
Corrosion inhibitors, Imidazoline, Amide, Carbon dioxide, Carbon steel, Electrochemical measurement, Weight loss test, Quartz crystal microbalance
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2022
Association for Materials Protection and Performance (AMPP)
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