Insight into the Ni microalloying effects on the corrosion characteristics and mechanism of Fe-21Mn-10Al-1.25C lightweight steels in chloride-containing solution

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2024-11-26 DOI:10.1016/j.conbuildmat.2024.139313

Weihan Yu, Yuqin Feng, Tonghan Guo, Wei Wu, Junxi Zhang

{"title":"Insight into the Ni microalloying effects on the corrosion characteristics and mechanism of Fe-21Mn-10Al-1.25C lightweight steels in chloride-containing solution","authors":"Weihan Yu, Yuqin Feng, Tonghan Guo, Wei Wu, Junxi Zhang","doi":"10.1016/j.conbuildmat.2024.139313","DOIUrl":null,"url":null,"abstract":"<div><div>Lightweight alloys primarily composed of iron (Fe), manganese (Mn), aluminum (Al), and carbon (C) are considered promising structural materials due to their excellent mechanical properties and low weight. The corrosion resistance of FeMnAlC alloys has recently gained widespread attention due to their great potential for service in marine environments. This paper studied the impact of Ni addition on the microstructure and corrosion resistance of an austenitic Fe-21Mn-10Al-1.25 C alloy in 3.5 % NaCl solution by microstructural analysis, electrochemical and immersion tests. Results showed that Ni addition worsened the corrosion resistance of the alloy. Specifically, the formation of (Ni, Al)-enriched B2 phases along grain boundaries significantly enhanced micro galvanic corrosion effect, leading to rapid dissolution of the austenitic matrix. Moreover, localized corrosion was accelerated by the increase in the proportion of high-angle grain boundaries and local dislocation density. Consequently, an inhomogeneous product film with segregation of Al and Cl elements was formed, providing inadequate protection for Fe-21Mn-10Al-1.25 C alloy.</div></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":"456 ","pages":"Article 139313"},"PeriodicalIF":7.4000,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950061824044556","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Lightweight alloys primarily composed of iron (Fe), manganese (Mn), aluminum (Al), and carbon (C) are considered promising structural materials due to their excellent mechanical properties and low weight. The corrosion resistance of FeMnAlC alloys has recently gained widespread attention due to their great potential for service in marine environments. This paper studied the impact of Ni addition on the microstructure and corrosion resistance of an austenitic Fe-21Mn-10Al-1.25 C alloy in 3.5 % NaCl solution by microstructural analysis, electrochemical and immersion tests. Results showed that Ni addition worsened the corrosion resistance of the alloy. Specifically, the formation of (Ni, Al)-enriched B2 phases along grain boundaries significantly enhanced micro galvanic corrosion effect, leading to rapid dissolution of the austenitic matrix. Moreover, localized corrosion was accelerated by the increase in the proportion of high-angle grain boundaries and local dislocation density. Consequently, an inhomogeneous product film with segregation of Al and Cl elements was formed, providing inadequate protection for Fe-21Mn-10Al-1.25 C alloy.

查看原文本刊更多论文

Ni微合金化对Fe-21Mn-10Al-1.25C轻钢在含氯化物溶液中腐蚀特性及机理的影响

主要由铁（Fe），锰（Mn），铝（Al）和碳(C)组成的轻质合金由于其优异的机械性能和低重量被认为是有前途的结构材料。FeMnAlC合金的耐腐蚀性能由于其在海洋环境中的巨大应用潜力而受到广泛关注。本文通过金相分析、电化学和浸渍试验，研究了添加Ni对奥氏体Fe-21Mn-10Al-1.25 C合金在3.5 % NaCl溶液中的组织和耐蚀性的影响。结果表明，Ni的加入使合金的耐蚀性变差。其中，沿晶界富集（Ni, Al）的B2相的形成显著增强了微电偶腐蚀效应，导致奥氏体基体快速溶解。高角晶界比例和局部位错密度的增加加速了局部腐蚀。因此，形成了Al和Cl元素偏析的不均匀产品膜，对Fe-21Mn-10Al-1.25 C合金的保护作用不足。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.