{"title":"Formation of zero-valent copper film during corrosion of carbon steel in aqueous drilling fluids","authors":"Evgeny Barmatov, Isabelle Atheaux, Anatoly Medvedev","doi":"10.1016/j.corsci.2025.112754","DOIUrl":null,"url":null,"abstract":"<div><div>The corrosion of carbon steels, including AISI 1018, API 5L Grade X65, and API 5CT P110, in aqueous drilling fluids was examined at 70 °C under both aerobic and anaerobic conditions. The corrosion behavior of these steels in aqueous drilling fluids is fundamentally different from that in brine (3 wt% NaCl) solutions due to the formation of a zero-valent copper-enriched film, which accelerates corrosion through galvanic mechanisms. The mechanism of copper film formation is proposed, and the key roles of metal composition, flow conditions, clay and barite microparticles, polymeric viscosifier, and oxygen scavengers in the reduction of Cu<sup>2+</sup> at the steel electrode are identified.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"246 ","pages":"Article 112754"},"PeriodicalIF":7.4000,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Corrosion Science","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0010938X25000812","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
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Abstract
The corrosion of carbon steels, including AISI 1018, API 5L Grade X65, and API 5CT P110, in aqueous drilling fluids was examined at 70 °C under both aerobic and anaerobic conditions. The corrosion behavior of these steels in aqueous drilling fluids is fundamentally different from that in brine (3 wt% NaCl) solutions due to the formation of a zero-valent copper-enriched film, which accelerates corrosion through galvanic mechanisms. The mechanism of copper film formation is proposed, and the key roles of metal composition, flow conditions, clay and barite microparticles, polymeric viscosifier, and oxygen scavengers in the reduction of Cu2+ at the steel electrode are identified.
期刊介绍：
Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies.
This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.
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