不锈钢管道内充氩气和不充氩气根道GMAW焊缝金属点蚀机理

IF 10.3 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Corrosion Science Pub Date : 2025-06-01 Epub Date: 2025-02-25 DOI:10.1016/j.corsci.2025.112825

Shuyi Liu , Yongle Shi , Huifeng Wang , Ning He , Youhui Sun , Huailiang Li , Shuhui Liu , Zhenmin Wang , Chunming Zhang , Yun Fang , Da Li , Kong Bao , Lianyong Xu , Yongdian Han

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引用次数: 0

摘要

研究了有氩气和无氩气的316L气体金属弧焊管道根部孔道的点蚀行为。后备气体通过减少引起凹坑的氧化物来提高抗点蚀性。无底气的焊缝由于快速的热传递，铁素体含量较高，Cr和Mo偏析更严重，导致耐蚀性降低。研究结果强调了焊接环境的关键作用，特别是氩气背景，通过影响微结构、夹杂物和钝化膜性能来提高点蚀性能。

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Pitting corrosion mechanism of root pass GMAW weld metal in stainless steel pipeline with and without internal Argon filling

This study investigates the pitting behavior of the root pass in gas metal arc welded 316L pipelines with and without Argon backing gas. Backing gas improved pitting resistance by reducing oxides that initiate pits. Welds without backing gas showed higher ferrite content and more severe Cr and Mo segregation due to rapid heat transfer, leading to reduced corrosion resistance. The findings underscore the critical role of welding environments, particularly Argon backing, in enhancing pitting corrosion performance by influencing microstructures, inclusions, and passive film properties.

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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.