储热用金属铸造增热剂的防腐PEO涂层

IF 2.4 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Surface Engineering Pub Date : 2023-06-03 DOI:10.1080/02670844.2023.2236363

Natalia Raźny, Anna Dmitruk, Krzysztof Naplocha

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引用次数: 0

摘要

该研究旨在确定通过等离子体电解氧化(PEO)获得的保护性氧化涂层是否会防止基于相变材料(PCMs)的用于热储能(TES)的铝热增强剂表面发生不利变化。对于家庭用途(短期，太阳能)，盐水合物被广泛用作pcm。它们的低导热性使得金属增强剂的应用是必要的，以改善机组的传热。由于MgCl2·H2O的化学腐蚀性，铝增强剂在工作循环中会受到负面影响。PEO的提出是为了克服装置的腐蚀问题。铸态样品在KOH-Na2SiO3电解液中包覆PEO后，置于熔融MgCl2·H2O环境中。通过扫描电镜、能谱仪、x射线衍射仪等测试手段研究了材料的质量变化和表面形貌。一层薄薄的氧化铝防止铸件在增强剂表面发生变化。

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Anticorrosive PEO coatings on metallic cast heat enhancers for thermal energy storage

The research aims to determine whether a protective oxide coating obtained by plasma electrolytic oxidation (PEO) will prevent unfavourable changes occurring on the surface of aluminium heat enhancers for thermal energy storage (TES) based on phase change materials (PCMs). For domestic purposes (short-term, solar energy), salt hydrates are widely utilised as PCMs. Their low thermal conductivity makes the application of metal enhancers necessary to improve heat transfer in the unit. Due to the chemically aggressive nature of MgCl2·H2O, aluminium enhancers can be negatively affected during working cycles. PEO was proposed to overcome corrosion issues in the units. Cast samples, coated with PEO for a short time in KOH-Na2SiO3 electrolyte, were subjected to a molten MgCl2·H2O environment. Mass change and the surface were studied via SEM, EDS, and XRD measurements. A thin layer of aluminium oxide prevented castings from changes occurring on the surface of the enhancer.

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来源期刊

Surface Engineering 工程技术-材料科学：膜

CiteScore

5.60

自引率

14.30%

发文量

审稿时长

2.3 months

期刊介绍： Surface Engineering provides a forum for the publication of refereed material on both the theory and practice of this important enabling technology, embracing science, technology and engineering. Coverage includes design, surface modification technologies and process control, and the characterisation and properties of the final system or component, including quality control and non-destructive examination.