Research on the electrochemical dissolution behavior of Ni-based superalloys after different oxidation treatments in NaCl solution
Anti-Corrosion Methods and Materials
ISSN: 0003-5599
Article publication date: 26 December 2024
Issue publication date: 13 February 2025
Abstract
Purpose
This study aims to investigate the corrosion resistance and electrochemical dissolution behavior of superalloys treated by different oxidation treatments.
Design/methodology/approach
Ni-based superalloys were subjected to oxidation treatment at 1000 °C for 10 h, 1150 °C for 10 h and 1200 °C for 20 h. The microstructure, electrochemical dissolution behavior, elemental distribution, as well as compactness and composition of the oxide layer, were studied.
Findings
The results show that both the thickness and the granular oxide size of the oxide layer on Ni-based superalloys increase with longer oxidation times and higher temperatures. The electrochemical dissolution efficiency of Ni-based superalloys decreases with increasing oxidation time and temperature. The reduced electrochemical dissolution efficiency observed in Ni-based superalloys oxidation-treated at 1200 °C for 20 h is primarily attributed to the thicker oxide layer, which contains the highest Cr oxide content.
Originality/value
The findings contribute to the advancement of recycling and utilization of Ni-based superalloy scrap.
Keywords
Acknowledgements
This work was supported by the National Key R&D Program of China under Grant (No. 2021YFB3700401) and Basic scientific research projects of colleges and universities of Liaoning Provincial Department of Education (No. LJKMZ20220753).
Declaration of Competing Interest: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Data Availability: The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.
Citation
Jiang, H., Guan, J., Zhao, Y., Qu, J. and Yang, Y. (2025), "Research on the electrochemical dissolution behavior of Ni-based superalloys after different oxidation treatments in NaCl solution", Anti-Corrosion Methods and Materials, Vol. 72 No. 2, pp. 257-266. https://doi.org/10.1108/ACMM-09-2024-3101
Publisher
:Emerald Publishing Limited
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