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Corrosion resistant alloys (CRAs) are used for many pipeline and wellhead components associated with oil and gas production environments but may be considered too costly for longer crude oil and natural gas production lines. Mitigation of internal corrosion for these types of pipelines is normally carried out by batch treatment or continuous injection of corrosion inhibitors, especially the surfactant type of organic inhibitors, which are more economical than using a CRA.
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The study of pitting susceptibility of carbon steel exposed to slightly sour service environment is conducted by using direct current and electrochemical impedance (IES). The test matrix is designed considering the oxidizing potential of the seawater as the independent variable.
Nickel base alloys with high chromium and molybdenum contents are very resistant to chloride-induced localized corrosion, even at relatively high temperatures. These alloys include the Ni-Cr-Mo(W) or “C” family of alloys and the novel Ni-Mo-Cr alloy HYBRID-BC1 (UNS N10362). Alloy 22 (UNS N06022) stands out due to its versatility: chromium and molybdenum contents were selected to optimize its corrosion behavior in oxidizing and reducing conditions. Alloy 625 (UNS N06625) has outstanding thermal ageing resistance and a longer in-service experience. The
This paper discusses the design philosophy for corrosion inhibitors used for carbon capture, transportation, and storage and the performance testing using rotating cylinder autoclave (RCA) and electrochemical impedance spectroscopy (EIS) methods under CO2 supercritical conditions.
Production of highly sour oil and gas fields has increased recently, which introduces new challenges forcorrosion control. In recent years, some unexpected and unexplained pipeline failures have occurred,resulting in complex investigations and laboratory corrosion performance testing studies to assess theinhibitors that are applied in these environments. While some of these failures are due to cracking insour environments which are prevented by alternative material selection or different operation pipelinemaintenance, we were specifically looking at cases where chemical inhibitors could be used to mitigatecorrosion.
Control of down-hole corrosion in and around sucker rod threads. Selection of lubricant and use of corrosion inhibitors against the effects of corrosive well fluids. Historical Document 1988
Corrosion of metallic structures is a ubiquitous problem in industries such as power generation, oil and gas, pulp and paper, metals processing etc. which also results in significant financial losses. According to the National Association of Corrosion Engineers (NACE) International report, the global cost of corrosion was ~ 2.5 trillion USD in 2013 - close to 3.4 percent GDP of the entire world. The use of corrosion inhibitors is one of the most effective and economical ways to mitigate corrosion of metal and alloy components. Corrosion inhibitors are substances that are added in small quantities in corrosive media to protect metal and alloy components from corrosion.
HISTORICAL DOCUMENT. Evaluating corrosion inhibitors used in the oil and gas industry. Describes types of inhibitors and how properties are evaluated. Provides 17 inhibitor properties that are evaluated prior to field application.
This NACE Standard Practice aims to provide guidance for selection and application of Corrosion Inhibitors (CI) for upstream oil and gas processes conditions exposed to corrosive environments.
The application of effective Corrosion Inhibitors (CI) in Oil and Gas production is essential to enable long term use of carbon steel in corrosive production environments. These chemical CI products can be applied continuously, or on a Batch (BI) basis. The effectiveness of CIs(products) that are applied has to be assured for the range of conditions associated with the application and for the lifetime of the facility. The assurance is predominantly achieved through laboratory testing. However, field evaluation of CIs can be a significant part of the assurance process.
This technical report presents basic information on laboratory evaluation of corrosion inhibitors used in the oil and gas industry. It includes 18 inhibitor properties that are evaluated before inhibitors are used in the field and refers to various standards available to evaluate those properties.