Sanicro 25 in advanced ultra-supercritical (AUSC) steam: Oxidation behaviour of a high strength, heat-resistant austenitic stainless steel for high-efficiency coal-fired power plants

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-03-19 DOI:10.1016/j.corsci.2025.112878

C. Sundaresan , Bhagwat Ghule , Kamanio Chattopadhyay , V.S. Raja

引用次数: 0

Abstract

The oxidation behaviour of Sanicro 25 was investigated in advanced ultra-supercritical (AUSC) steam at 650–710 ℃, 31 MPa for 600 h. The alloy recorded low weight gains and formed sub-micron-sized external oxide comprising (Mn,Fe,Ni)Cr₂O₄ spinel over Cr₂O₃. Its oxidation resistance was better than other candidate heat-resistant stainless steels and on par with Ni-base superalloy 617. Fine strengthening precipitates of Cu, Cr-rich M₂₃C₆, W-rich Lave’s and Nb-rich Z phases were found to form in the substrate during oxidation and their volume fraction increased with increasing temperature. The reasons for the alloy’s superior AUSC steam oxidation behaviour and its implications are discussed.

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.