海上应用不同GTA焊缝的耐腐蚀性能

IF 2.2 3区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Welding Journal Pub Date : 2023-01-01 DOI:10.29391/2023.102.002

W. Khan, Rahul Chhibber, N. Saini, Yajing Wang, Ravikiran Kopparthi, Suvan Dev Choudhury, Leijun Li

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引用次数: 1

摘要

研究了异种管线钢API X70和超级双相2507不锈钢钨极气体保护焊（GTA）的耐点蚀性能。GTA焊缝使用超级双相2594填充金属或奥氏体309L填充金属制造。从基底金属、焊接熔合区、熔合边界和热影响区（HAZ）提取的试样在3.5%NaCl水溶液中进行动电位腐蚀试验。发现使用309L填充金属制成的焊缝在铁素体和奥氏体之间具有较小的耐点蚀当量（PREN）差，使其比使用2594填充金属制造的焊缝更耐腐蚀。对于两种填充金属，X70侧的HAZ最容易受到点蚀和电偶腐蚀。

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Corrosion Resistance of Dissimilar GTA Welds for Offshore Applications

The pitting corrosion resistance of dissimilar pipeline steel API X70 and Super Duplex 2507 Stainless Steel gas tungsten arc (GTA) welds was studied. The GTA welds were fabricated using Super Duplex 2594 Filler Metal or austenitic 309L Filler Metal. The specimens extracted from the base metal, weld fusion zone, fusion boundary, and heat-affected zones (HAZs) were subjected to a potentiodynamic corrosion test in a 3.5% NaCl water solution. The weld made using the 309L Filler Metal was found to have a smaller pitting resistance equivalent number (PREN) difference between ferrite and austenite, making it more corrosion resistant than the weld fabricated using the 2594 Filler Metal. The HAZ on the X70 side was the most susceptible to pitting and galvanic corrosion for both filler metals.

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来源期刊

Welding Journal 工程技术-冶金工程

CiteScore

3.00

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： The Welding Journal has been published continually since 1922 — an unmatched link to all issues and advancements concerning metal fabrication and construction. Each month the Welding Journal delivers news of the welding and metal fabricating industry. Stay informed on the latest products, trends, technology and events via in-depth articles, full-color photos and illustrations, and timely, cost-saving advice. Also featured are articles and supplements on related activities, such as testing and inspection, maintenance and repair, design, training, personal safety, and brazing and soldering.