{"title":"Chloride Ion Effect on 316L SS Reinforcement in Fresh and Hardened Concrete: Electrochemical and Microscopic Analysis","authors":"Bouzeghaia Nora, Benarioua Mokhtar, Oulmi Kafia, Naoun Mahieddine, Abdou Imene","doi":"10.1134/S2070205124701685","DOIUrl":null,"url":null,"abstract":"<p>The study investigated the effect of chloride ions on corrosion and passivation of 316L stainless steel reinforcement. Initial chlorides were added to simulate fresh concrete contamination, while hardened concrete had a protective layer formed before chloride addition. The evaluation was carried out through electrochemical polarization and impedance spectroscopy techniques, as well as optical and scanning electron microscopy. The results indicated a difference in corrosion current values. The presence of chloride ions during the preparation of fresh concrete promotes the adsorption of Cl<sup>–</sup> ions in the form of dendritic growth NaCl and KCl on the stainless steel surface closely associated to micro pits covered by iron and chromium oxide deposits, preventing the adsorption of other species and thereby blocking the formation of the protective film composed mainly of calcium.</p>","PeriodicalId":745,"journal":{"name":"Protection of Metals and Physical Chemistry of Surfaces","volume":"60 2","pages":"333 - 342"},"PeriodicalIF":1.1000,"publicationDate":"2024-10-25","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/S2070205124701685","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
The study investigated the effect of chloride ions on corrosion and passivation of 316L stainless steel reinforcement. Initial chlorides were added to simulate fresh concrete contamination, while hardened concrete had a protective layer formed before chloride addition. The evaluation was carried out through electrochemical polarization and impedance spectroscopy techniques, as well as optical and scanning electron microscopy. The results indicated a difference in corrosion current values. The presence of chloride ions during the preparation of fresh concrete promotes the adsorption of Cl– ions in the form of dendritic growth NaCl and KCl on the stainless steel surface closely associated to micro pits covered by iron and chromium oxide deposits, preventing the adsorption of other species and thereby blocking the formation of the protective film composed mainly of calcium.
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
