Deciphering when Metal Corrosion is Spontaneous in Molten Fluorides Using Potential-Activity Diagrams

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

Corrosion Pub Date : 2023-09-18 DOI:10.5006/4401

Ho Lun Chan, John R. Scully

引用次数: 0

Abstract

ABSTRACT The work identifies the conditions for thermodynamically favored spontaneous metal corrosion using potential-activity diagrams tailored for high-temperature molten fluorides. These diagrams provide insights on the thermodynamic phase stability of both solid and dissolved metal species, such as Cr, Cr(II), Ni, Ni(II), Fe, and Fe(II), along with their potential primary oxidizers, including Eu(III), O2, and HF, over a broad range of theoretical F- anion activities. The work further examines the practical implications, prospects, and challenges associated with construction of these diagrams. The key objective of this research is to pinpoint crucial thermodynamic variables that substantially affect metal corrosion in the context of molten salt nuclear reactor applications.

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利用电位活度图破译熔融氟化物中金属腐蚀何时自发发生

本研究利用高温熔融氟化物的电位活度图确定了热力学上有利于金属自发腐蚀的条件。这些图表提供了固体和溶解金属的热力学相稳定性的见解，如Cr, Cr(II)， Ni, Ni(II)， Fe和Fe(II)，以及它们潜在的初级氧化剂，包括Eu(III)， O2和HF，在广泛的理论F-阴离子活性范围内。该工作进一步检查了与这些图的构建相关的实际含义、前景和挑战。本研究的主要目的是确定在熔盐核反应堆应用中实质性影响金属腐蚀的关键热力学变量。

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.