Toward High Pitting Resistance and Low-Cost Austenitic Stainless Steel: the Role of Carbon Alloying

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Pub Date : 2023-09-18 DOI:10.5006/4395

Kangkang Zheng, Wei Dai, Donghua Suo, Zhe Fang, Yiming Jiang, Jin Li, Zhiyu Wang, Yangting Sun

引用次数: 0

Abstract

This article investigates the pitting resistance of a newly developed Fe-Cr-Mn-N austenitic stainless steel with 0.14 wt% carbon and its counterpart with 0.02 wt% carbon. By using especially hot-rolled bimetal specimens, we focus on the pitting behavior near the interface between the two alloys and demonstrate that solid solution carbon can significantly improve pitting resistance. The alloyed carbon increases the passive film stability, but the more fundamental reason is that carbon suppresses the active dissolution rate of the matrix, thereby inhibiting the kinetics of pitting growth. These results will highlight the use of carbon alloying in austenitic stainless steel to provide more cost-effective materials with improved corrosion resistance and mechanical strength for the construction industry.

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迈向高抗点蚀和低成本奥氏体不锈钢:碳合金化的作用

本文研究了新研制的含碳0.14 wt%的Fe-Cr-Mn-N奥氏体不锈钢和含碳0.02 wt%的Fe-Cr-Mn-N奥氏体不锈钢的抗点蚀性能。通过使用热轧双金属试样，我们重点研究了两种合金界面附近的点蚀行为，并证明了固溶体碳可以显著提高抗点蚀性。合金碳增加了钝化膜的稳定性，但更根本的原因是碳抑制了基体的活性溶解速率，从而抑制了点蚀生长的动力学。这些结果将突出奥氏体不锈钢中碳合金的使用，为建筑行业提供更具成本效益的材料，提高耐腐蚀性和机械强度。

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 MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

2.80

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： CORROSION is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control. The scope of the journal includes the latest developments in areas of corrosion metallurgy, mechanisms, predictors, cracking (sulfide stress, stress corrosion, hydrogen-induced), passivation, and CO2 corrosion. 70+ years and over 7,100 peer-reviewed articles with advances in corrosion science and engineering have been published in CORROSION. The journal publishes seven article types – original articles, invited critical reviews, technical notes, corrosion communications fast-tracked for rapid publication, special research topic issues, research letters of yearly annual conference student poster sessions, and scientific investigations of field corrosion processes. CORROSION, the Journal of Science and Engineering, serves as an important communication platform for academics, researchers, technical libraries, and universities. Articles considered for CORROSION should have significant permanent value and should accomplish at least one of the following objectives: • Contribute awareness of corrosion phenomena, • Advance understanding of fundamental process, and/or • Further the knowledge of techniques and practices used to reduce corrosion.