Effect of microstructure evolution on microbiologically influenced corrosion of friction stir welded 17-4PH stainless steel

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

Corrosion Science Pub Date : 2025-04-23 DOI:10.1016/j.corsci.2025.112977

Li Zhao , Xiaomi Chen , Weiwei Chang , Quan Liu , Hongchang Qian , Dawei Guo , Chi Tat Kwok , Lap Mou Tam , Dawei Zhang

引用次数: 0

Abstract

The microstructural evolution under different rotation speeds and its impact on microbiologically influenced corrosion (MIC) behavior of friction stir welded (FSW) 17–4PH stainless steel were investigated. Severe plastic deformation (SPD) and dynamic recrystallization (DRX) of FSW led to microstructural homogenization and the fragmentation of sulfide inclusions, thereby reducing microbial adhesion sites and improving MIC resistance. However, excessively high rotation speeds resulted in the formation of defects and increased dislocation density, which enhanced microbial attachment and accelerated the degradation of passive film, thus promoting MIC. The FSW sample with a rotation speed of 300 rpm exhibited the best MIC resistance.

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17-4PH不锈钢搅拌摩擦焊微观组织演变对微生物腐蚀的影响

研究了17-4PH搅拌摩擦焊（FSW）不锈钢在不同转速下的微观组织演变及其对微生物腐蚀行为的影响。FSW的剧烈塑性变形（SPD）和动态再结晶（DRX）导致微观组织均匀化和硫化物夹杂物破碎，从而减少微生物粘附位点，提高抗MIC能力。然而，过高的转速会导致缺陷的形成和位错密度的增加，从而增强了微生物的附着，加速了被动膜的降解，从而促进了MIC。转速为300 rpm的FSW样品抗MIC性能最好。

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.