Hot Corrosion Resistance of Severely Plastically Deformed Alloys: A Review

Document Type : Review Paper

Authors

1 Department of Materials Science and Engineering, University of Bonab, Bonab, Iran

2 Department of Metallurgy and Materials Science, Imam Khomeini International University (IKIU), Qazvin, Iran

Abstract

Hot corrosion (HC) causes failure in high temperature components, such as gas turbines and power plants. The HC resistance of the alloys relies on the formation of resistant oxide scales. In this review paper, different atmospheres and salt compositions causing HC, the pertinent mechanisms, and the influencing factors such as time, temperature, and alloy’s composition were briefly discussed. Despite extensive research on the effect of alloy’s composition on the HC behavior, the alloy’s microstructure/defect structure which can affect the kinetics of diffusional processes during HC has been less noticed. Based on the survey on several articles on the effects of various SPD techniques on the microstructure/defect structure of the alloys, it was noted that the severe plastic deformation (SPD), featuring highly distorted crystal lattices, and a high density of lattice defects such as vacancies, dislocations, twins, and stacking faults together with considerable grain refinement through the formation of high angle grain boundaries is a potential technique to enhance the HC resistance of the alloys through the enhanced rate of the formation of protective oxide scales, and their healing up after a possible corrosion attack. Therefore, a number of few studies on the HC behavior of the SPDed materials were reviewed in the last section of this paper and the positive effect of the SPD on the HC resistance of the alloys was confirmed.

Keywords

References

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Journal of Ultrafine Grained and Nanostructured Materials
Volume 59, Issue 1
June 2026
Pages 65-89

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History

  • Receive Date: 04 April 2026
  • Revise Date: 24 April 2026
  • Accept Date: 25 April 2026

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