Creep stress induced pit-to-crack transition of Super304H in fireside corrosion

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

Corrosion Science Pub Date : 2024-09-19 DOI:10.1016/j.corsci.2024.112470

Xiaofeng Yang , Yaxin Xu , Shuo Fu , Jintao Lu , Jinyang Huang , Wenya Li

引用次数: 0

Abstract

Parallel experiments on creep-rupture and corrosion of Super304H were conducted at 650 ℃ in a simulated ultra-supercritical fireside environment to study the impact of creep stress on fireside corrosion. The corrosion products, corrosion pits, grain structure and phase composition, and surface cracks of creep-corrosion and corrosion samples were compared. Results show that stresses not only affect the formation and growth of corrosion products, but also widen the recrystallization zone in corrosion affected area. A model of surface cracking from corrosion pits under the synergy of fireside corrosion and creep stress was proposed.

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蠕变应力诱导 Super304H 在炉边腐蚀中的凹坑-裂缝转变

在 650 ℃ 的模拟超超临界炉边环境中，对 Super304H 进行了蠕变破裂和腐蚀平行实验，以研究蠕变应力对炉边腐蚀的影响。比较了蠕变腐蚀和腐蚀样品的腐蚀产物、腐蚀坑、晶粒结构和相组成以及表面裂纹。结果表明，应力不仅会影响腐蚀产物的形成和生长，还会扩大腐蚀影响区域的再结晶区。提出了在火侧腐蚀和蠕变应力协同作用下腐蚀坑表面开裂的模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.