Effect of La on the Corrosion Behavior and Mechanism of 3Ni Weathering Steel in a Simulated Marine Atmospheric Environment

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外文摘要：The corrosion behavior and mechanism of 3Ni weathering steel in a simulated oceanic atmospheric environment are investi-gated in order to comprehend the impacts of La,as determined through electrochemical analysis and rust layer characteriza-tion.The results of this study demonstrate that the addition of La enhances the corrosion resistance of 3Ni weathering steel in the marine atmospheric environment,thereby reducing the corrosion rate and improving the protection of the rust layer.The influence of La on corrosion resistance can be attributed to two primary factors.Firstly,La functions as a grain refiner,minimizing the potential difference of the micro-regions on the substrate surface,thereby significantly reducing the corro-sion of bare steel in the marine environment.Secondly,La inhibits the process of Fe3O4 oxidation back to γ-FeOOH during corrosion at the local site,thus decreasing the formation of γ-FeOOH and enhancing the charge transfer resistance.This research work may serve as a reference for expanding the application of rare earth elements in the field of weathering steel.

外文关键词：

Weathering steelRare earthRust layerCorrosion behaviorCorrosion resistance

作者：

Gang Niu、Rui Yuan、R.D.K.Misra、Na Gong、Zhi-Hui Zhang、Hao-Xiu Chen、Hui-Bin Wu、Cheng-Jia Shang、Xin-Ping Mao

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作者单位：

Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China

Laboratory for Excellence in Advanced Steel Research,Department of Metallurgical,Materials and Biomedical Engineering,University of Texas at El Paso,El Paso,TX 79968,USA

Institute of Materials Research and Engineering,Agency for Science,Technology,and Research,Singapore 138634,Singapore

Department of Materials Science and Engineering,University of Toronto,Toronto,ON M5S 3E4,Canada

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基金：

国家重点研发计划国家自然科学基金中国博士后科学基金

项目编号：

2021YFB3701700523043892022M720402

出版年：

2024

DOI：

10.1007/s40195-023-01624-6

金属学报(英文版)