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High-Temperature Corrosion Testing Facility for Coating Materials in Simulated Geothermal Environment

机译：模拟地热环境中涂层材料的高温腐蚀测试设施

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This paper is part of a project entitled "Geo-Coat" aimed at developing new and cost-effective corrosion resistant coatings for geothermal applications. The subject of this study is the design and function of a laboratory facility used for corrosion testing of the developed coating materials in simulated high-temperature geothermal conditions. The coating materials developed within the project for corrosion testing are High Entropy Alloys (HEA), Ceramic-Metal materials (Cermet), and Electroless Nickel Coatings. The performance of these coatings will be compared to material commonly used for geothermal equipment such as carbon steel which can experience corrosion and erosion. Samples coated with such substrates are placed into the flow-through reactor and exposed to prepared geofluid, with acidic pH and elevated H_2S and CO_2 concentration, for several days or weeks. Passing "geothermal" solution is sampled and monitored, and the surface/microstructural inspection with the chemical composition of tested coatings are studied by the scanning electron microscope (SEM/EDS). Best coating candidates can increase the durability of commonly used alloy materials in geothermal applications.
机译：本文是名为“ Geo-Coat”的项目的一部分，该项目旨在为地热应用开发新型且具有成本效益的耐腐蚀涂层。本研究的主题是用于在模拟的高温地热条件下对已开发涂层材料进行腐蚀测试的实验室设施的设计和功能。在项目中开发的用于腐蚀测试的涂层材料是高熵合金（HEA），陶瓷金属材料（金属陶瓷）和化学镍涂层。这些涂料的性能将与地热设备常用的材料（例如碳钢）发生腐蚀和侵蚀的性能进行比较。将涂覆有此类基材的样品放入流通式反应器中，并暴露于具有酸性pH值和升高的H_2S和CO_2浓度的制备的流体中，持续数天或数周。对通过的“地热”溶液进行采样和监控，并通过扫描电子显微镜（SEM / EDS）研究具有被测涂层化学成分的表面/微观结构。最佳的候选涂层可以提高地热应用中常用合金材料的耐用性。

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