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Several hundred wireless wall-thickness monitoring sensors were installed in crude and vacuum distillation units. This enables capability to determine the corrosion risk associated with different crudes long before any undesirable consequences of corrosion events occur.
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Results, interpretation, benefits and limits of using electrochemical impedance spectroscopy (EIS). Results reveal CI protection/failure mechanisms under specific test conditions.
This paper describes corrosion inhibitor tests that were carried out at different temperatures and interpreted using Langmuir adsorption and desorption.
In this study, different concentrations of C6H5NH2 (Aniline) were employed for investigating its corrosion inhibition of stainless steel in 0.5 M HCl.
The work conducted produced conditions where preferential weld corrosion initiated in uninhibited conditions and was sustained throughout inhibition. Two types of weld metallurgies; one weld consumable with 1% nickel, the second matched the parent pipe.
Corrosion behavior of carbon steel in an in-house solvent was investigated in a pilot-scale post combustion CO2 capture process. Carbon steel specimens were placed where corrosion problems were previously found in the stripper column and the CO2-rich amine piping.
Five case studies of corrosion related failures in alkanolamine acid gas removal systems including the following types of corrosion: Uniform, Pitting, Chloride Induced Crevice, Cavitation, and Microbiologically Induced Corrosion (MIC).
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.
This paper describes the performance of film persistent corrosion inhibitors that are effective at fairly high temperatures and in systems that see large amounts of carbon dioxide (CO2). Use of batch treatment with the correct chemical, at the proper frequency resulted in substantial decrease in operating cost.
Application of corrosion inhibitors confer many advantages for combatting internal pipeline corrosion in the upstream oil and gas industry. It is known that the associated costs for using corrosion inhibitors are low compared to other mitigation techniques [1]. For continuous injection procedures, water-soluble inhibitors are not expected to form long-lasting films, so they must be continuously injected to maintain their effectiveness. Batch inhibitors are usually higher molecular weight species and oil soluble. They tend to be more tenacious, providing a protective barrier between the water and the metal over a long period of time.
Internal corrosion of pipelines associated with oil and gas production and refinery has always been a challenge for corrosion engineers. Over the past decades, corrosion engineers have made significant progress in developing mitigation approaches to protect these carbon steel pipelines by using corrosion inhibitors (CIs), corrosion resistant materials, and various cleaning techniques. Among all these mitigation strategies, corrosion inhibitors are considered as the first choice in handling the internal corrosion of pipelines.
Corrosion inhibitors is commonly used to combat internal corrosion of mild steel pipelines in oil and gas production and transmission systems. Since the corrosive environment and flow conditions could vary in different fields, small scale laboratory testing is essential to determine the effectiveness of inhibitors in specific corrosive environments. To ensure the accuracy of inhibitor dosage in a small-scale lab setup, the inhibitor often needs to be pre-diluted before addition to the test electrolyte. This pre-dilution has the potential to lead to experimental errors. However, little information can be found about pre-dilution steps, and their influence on inhibition phenomena, in the open literature.