Use of a Gemini-Surfactant Synthesized from the Mango Seed Oil as a CO2-Corrosion Inhibitor for X-120 Steel

Abstract

A gemini surfactant imidazoline type, namely N-(3-(2-fatty-4,5-dihydro-1H-imidazol-1-yl) propyl) fatty amide, has been obtained from the fatty acids contained in the mango seed and used as a CO2 corrosion inhibitor for API X-120 pipeline steel. Employed techniques involved potentiodynamic polarization curves, linear polarization resistance, and electrochemical impedance spectroscopy. These tests were supported by detailed scanning electronic microscopy (SEM) and Raman spectroscopy studies. It was found that obtained gemini surfactant greatly decreases the steel corrosion rate by retarding both anodic and cathodic electrochemical reactions, with an efficiency that increases with an increase in its concentration. Gemini surfactant inhibits the corrosion of steel by the adsorption mechanism, and it is adsorbed on to the steel surface according to a Langmuir model in a chemical type of adsorption. SEM and Raman results shown the presence of the inhibitor on the steel surface.

Inhibition of X52 Corrosion in CO2-Saturated Brine by a Dialkyl-Diamide from Coffee Bagasse Oil

“…At this temperature, the optimal dose of the inhibitor is 25 ppm. The Rp values obtained are considerably larger than those reported for similar inhibitors [ 17 , 19 ].…”

“…The inhibition efficiencies are higher than those obtained with similar inhibitors obtained from other vegetable oils [ 17 , 19 ] and imidazolines with more than one hydrocarbon chain [ 13 ]. The higher inhibition efficiencies may be due to the presence of unsaturations in the hydrocarbon chains that favor the adsorption of the inhibitor to the metal surface [ 14 , 23 , 24 ].…”

“…The evaluated inhibitor was a dialkyl-diamide from coffee bagasse oil that, according to its synthesis process [ 17 , 19 , 46 , 47 , 48 ], has a general structure as shown in Figure 6 . The diaminodiethylamine group of the molecule is the electron-rich hydrophilic section that promotes its adsorption to the metal surface and hydrocarbon chains is the hydrophobic region that decreases the wettability of the steel surface [ 13 ].…”

“…The use of oils obtained from agro-industrial waste has proven to be a sustainable alternative for the development and synthesis of green corrosion inhibitors, and its excellent performance as sweet corrosion inhibitors has been demonstrated [ 6 , 15 , 16 , 17 , 18 ]. Its oils have a content of fatty acids such as stearic, oleic, linoleic, and palmitic, suitable for the synthesis of amide- and imidazoline-type inhibitors, and in particular those inhibitors obtained from coffee bagasse oil have proven to be efficient corrosion inhibitors [ 4 , 5 , 6 , 7 ].…”

Developing novel imidazoline-modified glucose derivatives as eco-friendly corrosion inhibitors for Q235 steel

“…Despite their popularity, most of these derivatives also negatively impact the environmental profile. In contrast, natural resources, such as those extracted or modified from plants or agro-industrial waste, for instance, coffee bagasse oil, 12 rice bran oil, 13,14 wasted mango seeds, 15 wasted avocado oil, 16 and Rosa canina fruit, 17 have been used to synthesize corrosion inhibitors and have received great attention due to their non-toxicity, biodegradability, and they have no negative influence on the environment. 18 However, problematic extraction and storage still limit their large-scale commercialization.…”