Mehdi Javidi, Seyed Jabbar Fatemifar, Mohammad Amin Sadeghi
{"title":"Localized CO2 Corrosion due to Galvanic Effect on the Surface of API 5L X65 Steel in the Presence of Iron Carbonate Corrosion Product","authors":"Mehdi Javidi, Seyed Jabbar Fatemifar, Mohammad Amin Sadeghi","doi":"10.1134/S2070205124702204","DOIUrl":null,"url":null,"abstract":"<p>Localized CO<sub>2</sub> corrosion is one of the most significant concerns for mild steels used in the oil and gas industry. The formation of iron carbonate on the steel surface under CO<sub>2</sub> corrosion conditions can lead to localized corrosion. The degradation of this corrosion product in specific areas, influenced by factors such as fluid velocity, creates a galvanic couple between the protected and unprotected steel surfaces. This study employs the artificial pit method and zero-resistance ammetery technique to investigate this galvanic couple. The effects of temperature, pH, inhibitor, and NaCl salt concentration on the galvanic current density between iron carbonate-covered and bare areas of API 5L X65 carbon steel were examined. Results indicate that high salt concentration, low pH, and lower temperatures increase the galvanic current density between the FeCO<sub>3</sub>-covered and bare areas.</p>","PeriodicalId":745,"journal":{"name":"Protection of Metals and Physical Chemistry of Surfaces","volume":"60 5","pages":"1010 - 1021"},"PeriodicalIF":0.8000,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Protection of Metals and Physical Chemistry of Surfaces","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1134/S2070205124702204","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 0
Abstract
Localized CO2 corrosion is one of the most significant concerns for mild steels used in the oil and gas industry. The formation of iron carbonate on the steel surface under CO2 corrosion conditions can lead to localized corrosion. The degradation of this corrosion product in specific areas, influenced by factors such as fluid velocity, creates a galvanic couple between the protected and unprotected steel surfaces. This study employs the artificial pit method and zero-resistance ammetery technique to investigate this galvanic couple. The effects of temperature, pH, inhibitor, and NaCl salt concentration on the galvanic current density between iron carbonate-covered and bare areas of API 5L X65 carbon steel were examined. Results indicate that high salt concentration, low pH, and lower temperatures increase the galvanic current density between the FeCO3-covered and bare areas.
期刊介绍：
Protection of Metals and Physical Chemistry of Surfaces is an international peer reviewed journal that publishes articles covering all aspects of the physical chemistry of materials and interfaces in various environments. The journal covers all related problems of modern physical chemistry and materials science, including: physicochemical processes at interfaces; adsorption phenomena; complexing from molecular and supramolecular structures at the interfaces to new substances, materials and coatings; nanoscale and nanostructured materials and coatings, composed and dispersed materials; physicochemical problems of corrosion, degradation and protection; investigation methods for surface and interface systems, processes, structures, materials and coatings. No principe restrictions exist related systems, types of processes, methods of control and study. The journal welcomes conceptual, theoretical, experimental, methodological, instrumental, environmental, and all other possible studies.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
