Viability of Cathodic Protection for Preventing Corrosion of SS316H in Molten LiF-NaF-KF

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

Corrosion Pub Date : 2023-05-23 DOI:10.5006/4265

K. Sankar, Preet M. Singh

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引用次数: 1

Abstract

Molten fluoride salts are candidate heat transfer fluids in a number of applications such as generation IV Molten Salt Nuclear Reactors (MSRs) and Concentrated Solar Power (CSP) Plants. However, a chief concern in the design of these systems is the corrosion of structural materials that come in contact with these molten salts. Redox control methods such as purification of salt, addition of active elements, and applied electrochemical potential can be efficient methods for preventing corrosion of structural materials in molten fluoride salts. Applied electrochemical potential as a redox control method for application in molten fluoride salts has rarely been explored. This study seeks to understand the viability of impressed current Cathodic Protection (CP) at various currents as a redox control method to prevent corrosion of Stainless Steel 316H in molten LiF-NaF-KF (FLiNaK) salt. Results show that application of CP can be an effective method to prevent corrosion of SS316H in molten FLiNaK salt, but the applied current will have to be optimized to prevent undesirable side effects such as reduction of salt constituents, salt deposition on electrodes etc.

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金属熔体中防止SS316H腐蚀的阴极保护可行性

熔融氟化物盐是许多应用中的候选传热流体，如第四代熔融盐核反应堆（MSRs）和聚光太阳能发电厂（CSP）。然而，在这些系统的设计中，主要关注的是与这些熔融盐接触的结构材料的腐蚀。氧化还原控制方法，如盐的纯化、活性元素的添加和施加的电化学电势，可以是防止结构材料在熔融氟化物盐中腐蚀的有效方法。应用电化学电势作为氧化还原控制方法在熔融氟化物盐中的应用很少被探索。本研究旨在了解外加电流阴极保护（CP）在各种电流下的可行性，作为一种氧化还原控制方法，以防止316H不锈钢在熔融LiF-NaF-KF（FLiNaK）盐中腐蚀。结果表明，CP的应用可能是防止SS316H在熔融FLiNaK盐中腐蚀的有效方法，但必须优化施加的电流，以防止不良副作用，如盐成分的减少、电极上的盐沉积等。

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.