Characterization of Fe and Cr Dissolution and Reaction Product Formation in Molten Chloride Salts With and Without Impurities

IF 1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials at High Temperatures Pub Date : 2023-05-01 DOI:10.1080/09603409.2023.2205754

B. Pint, Y.-F. Su, D. Sulejmanovic, R. Pillai

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引用次数: 1

Abstract

ABSTRACT There is considerable interest in molten chloride salts for several applications including thermal storage and next-generation molten salt reactors (MSRs). Several studies have concluded that Cl salts are highly corrosive to structural materials. Using Oak Ridge National Laboratory’s established methodology, Cl salt compatibility was assessed for candidate Ni-based alloys 230, 600 and 740 H at 600°–800°C in static welded capsules and in flowing thermal convection loop (TCL) salt experiments. Simply drying commercial Cl salt at 550°–650°C and adding~0.05 wt.%Mg was able to produce small specimen mass changes and limited surface attack after 100–1000 h exposures. Intentional additions of H2O, NiCl2 and undried salt were used to better understand the role of impurities and achieve the>50 µm levels of attack reported in other studies. Characterisation of Cr depletion and oxide formation in conjunction with pre- and post-test salt chemistry measurements are being used to understand salt compatibility of structural materials.

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铁和铬在含和不含杂质的熔融氯盐中溶解和反应产物生成的表征

熔盐在热存储和下一代熔盐反应器(MSRs)等方面的应用引起了人们的极大兴趣。一些研究已经得出结论，氯盐对结构材料具有很强的腐蚀性。使用橡树岭国家实验室建立的方法，在静态焊接胶囊和流动热对流环(TCL)盐实验中评估了候选ni基合金230、600和740 H在600°-800°C下的Cl盐相容性。在550°-650°C下干燥商品氯化盐，加入~0.05 wt。在暴露100-1000小时后，Mg能够产生很小的试样质量变化和有限的表面侵蚀。有意添加H2O、NiCl2和未干盐是为了更好地了解杂质的作用，并达到其他研究中报道的>50µm的攻击水平。Cr损耗和氧化物形成的特征与测试前和测试后的盐化学测量相结合，用于了解结构材料的盐相容性。

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来源期刊

Materials at High Temperatures 工程技术-材料科学：综合

CiteScore

1.90

自引率

15.40%

发文量

审稿时长

>12 weeks

期刊介绍： Materials at High Temperatures welcomes contributions relating to high temperature applications in the energy generation, aerospace, chemical and process industries. The effects of high temperatures and extreme environments on the corrosion and oxidation, fatigue, creep, strength and wear of metallic alloys, ceramics, intermetallics, and refractory and composite materials relative to these industries are covered. Papers on the modelling of behaviour and life prediction are also welcome, provided these are validated by experimental data and explicitly linked to actual or potential applications. Contributions addressing the needs of designers and engineers (e.g. standards and codes of practice) relative to the areas of interest of this journal also fall within the scope. The term ''high temperatures'' refers to the subsequent temperatures of application and not, for example, to those of processing itself. Materials at High Temperatures publishes regular thematic issues on topics of current interest. Proposals for issues are welcomed; please contact one of the Editors with details.