Design and Discovery of Compositionally Complex Alloys (CCA) that Include High Corrosion Resistance

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

Corrosion Pub Date : 2024-01-05 DOI:10.5006/4451

S.B. Inman, J.R. Scully

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Abstract

The novel compositionally complex alloy (CCA) design space provides opportunities to improve corrosion resistance through design of passive films based on alloy composition and structure. The passive films are designed to provide corrosion protection by regulating charge transfer and transport processes operative during corrosion as well as by providing self-healing capability. Film protectivity can be obtained from single passivating element oxidation, passivity “helper” elements, secondary passivators, as well as other second and third element effects. Oxides can form congruently or enrich in certain elements and be depleted in others. The wide arrange of possible alloying combinations and resultant oxide compositions for a given design space necessitates efficient alloy selection for experimental synthesis and characterization of down-selected choices with high potential for good corrosion resistance. A design process for Al-Co-Cr-Fe-Mn-Mo-Ni containing CCAs providing testable strategies for effective incorporation of corrosion-influencing elements in the oxide is introduced. Guidelines for elemental selection for protection by passive oxides, compositional optimization, and microstructural refinement are discussed.

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设计和发现具有高耐腐蚀性的成分复杂合金 (CCA)

新型成分复杂合金（CCA）的设计空间为通过设计基于合金成分和结构的无源膜来提高耐腐蚀性提供了机会。被动膜的设计目的是通过调节腐蚀过程中的电荷转移和传输过程以及提供自修复能力来提供腐蚀保护。薄膜保护能力可通过单一钝化元素氧化、钝化 "辅助 "元素、二级钝化剂以及其他第二和第三元素效应获得。氧化物可以同时形成，也可以在某些元素中富集，而在其他元素中贫化。在给定的设计空间内，可能的合金组合和由此产生的氧化物成分范围很广，这就需要对合金进行有效的选择，以便通过实验合成和表征向下选择出具有良好耐腐蚀性的高潜力合金。本文介绍了含 Al-Co-Cr-Fe-Mn-Mo-Ni CCA 的设计流程，为在氧化物中有效加入腐蚀影响元素提供了可测试的策略。文中还讨论了通过被动氧化物提供保护的元素选择、成分优化和微结构细化指南。

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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.