In-situ studies of rust layer formed on OCTG N80 steels alloyed with rare earth elements

Huiwei Xu; Liya Guo; Jie Hu; Long Chen; Yulong Han; Bo Lu; Hongshan Zhao; Jiaxin Bai; Xicheng Wei; Han Dong

Journal of Materials Research and Technology (Jan 2024)

In-situ studies of rust layer formed on OCTG N80 steels alloyed with rare earth elements

Huiwei Xu,
Liya Guo,
Jie Hu,
Long Chen,
Yulong Han,
Bo Lu,
Hongshan Zhao,
Jiaxin Bai,
Xicheng Wei,
Han Dong

Affiliations

Huiwei Xu: School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing, 314100, PR China
Liya Guo: School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing, 314100, PR China; Corresponding author. School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China.
Jie Hu: School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing, 314100, PR China
Long Chen: School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing, 314100, PR China
Yulong Han: School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing, 314100, PR China
Bo Lu: School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China
Hongshan Zhao: School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing, 314100, PR China; Corresponding author. School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China.
Jiaxin Bai: Hebei Province Longfengshan Casting Industry Co., Ltd., China
Xicheng Wei: School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing, 314100, PR China
Han Dong: School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, PR China; Zhejiang Institute of Advanced Materials, Shanghai University, Jiaxing, 314100, PR China

Journal volume & issue: Vol. 28
pp. 2280 – 2289

Abstract

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In this study, the effect of rare earth (RE) alloying on the rust formed on N80 steels was investigated with in-situ micro-Raman spectroscopy and optical microscopy. Under potentiostatic tests at potentials representing accelerated conditions, there was formation of goethite phase on N80RE, while this protective and stable rust layer was not found on N80. The presence of goethite might explain the smaller corrosion rate of N80RE than N80 at later stages of corrosion, although the initial corrosion rate of N80RE was greater, which was probably due to RE modified inclusions.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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