Work

Improvement of corrosion resistance of 316LN stainless steel by ultrasonic surface rolling process

Year: 2025

Type: article

Abstract: 316LN austenitic stainless steel (SS) with gradient structures was fabricated by the Ultrasonic Surface Rolling Process (USRP). Their pitting corrosion behavior was studied. The results reveal a dual effect induced by USRP: the pitting potential significantly increased from 0.14 to 0.46 V SCE , with the passive region expanded by a factor of 2. These improvements are attributed to a 46.61 % enhancement in Cr 2 O 3 content within the passive film, a 10.38 % increase in film thickness, and a reduced defect density (13.4 % and 31.3 % decreases in and values). Here, and represent donor and acceptor densities in the Mott-Schottky test, respectively. Conversely, a 29.7 % increase in metastable pitting initiation frequency was observed. However, the enhanced repassivation capability (a 60 % elevation in E prot - E corr potential difference) effectively inhibited the transition to stable pit growth. Collectively, the USRP demonstrates a remarkable enhancement in the corrosion resistance of 316LN SS through passive film composition modification, structural optimization, and dynamic repassivation capability improvement.

Source: Materials Today Communications

DOI: 10.1016/j.mtcomm.2025.114475

Authors: Xingwang Feng, Yunxin Wang, Li Zhang, Yanli Wang, Bin Yang

Institutions: State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing

Language: English

Topic: Hydrogen embrittlement and corrosion behaviors in metals

Subfield: Metals and Alloys

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,830

OpenAlex ID: W4417149673

FWCI: 0.218

Cites: 43

Cited by: 1

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