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In many service applications excursions in solution chemistry, temporary loss of inhibitor, or transient increases in temperature may give rise to localised corrosion. To test the return of inhibition when the loss is remedied, the use of an artificial pit has been investigated using simulations of cooling water and of of oil production formation water.
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Imidazoline derivatives have anti-corrosive effects on metals such as carbon steel and are widely used in acid-corroded pipelines for conveying oil and natural gas. In this paper, a novel imidazoline inhibitor was designed and synthesized.
Data were collected to study the effect of an imidazoline based inhibitor on reducing CO2 corrosion of low carbon steel in erosive environments. Lower erosion-corrosion material loss was measured with inhibitor than with the protective iron carbonate scale.
Inhibition performance of a diethylenetriamine tall oil fatty acid imidazoline-type inhibitor (DETA/TOFA imidazoline) against CO2 corrosion of an API 5L X65 carbon steel was studied at two temperatures, 120C and 150C.
A lot of oil and gas facilities face corrosion problems because the production fluid contains some corrosive components represented by CO2. Generally, corrosion inhibitors are used in order to mitigate corrosion problems of tubing and pipeline. Imidazoline is known as one of the active ingredients of corrosion inhibitors and widely used in the oil and gas industries. However, imidazoline-type inhibitor is easily hydrolyzed to amide if water mixes into it.
Localized corrosion is known as the most dangerous and unpredictable corrosion mechanisms found in hydrocarbon production and transmission systems. This mode of corrosion has the potential to cause serious financial loss, environmental damage, production interruption, and even loss of life. Over the years, corrosion engineers have made significant improvements on prediction and mitigation techniques to extend the lifespan of carbon steel pipelines, such as using of corrosion inhibitors; injection of such chemicals has proven to be effective and economic, making them a first choice over other alternatives
Adsorption/desorption process of 1-(2-aminoethyl)-2-oleyl-2-imidazolinium chloride on carbon steel. To study adsorption of imidazolinium chloride on carbon steel, in-situ atomic force microscopy measurements were performed in air, with and without imidazolinium chloride, in a 1 wt% NaCl solution purged with CO2 at pH 4.