Fireside performance of different coatings in biomass power plant

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

Materials at High Temperatures Pub Date : 2023-03-12 DOI:10.1080/09603409.2023.2188351

S. Mori, Andrew Pidcock, J. Sumner, N. Simms, J. Oakey

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Abstract

ABSTRACT The energy sector will need to employ novel strategies to reduce greenhouse gas emissions, such as the increase of steam temperatures/pressures or the use of low carbon fuels (i.e. biomass). Both cause heat exchanger materials’ degradation issues, due to the formation of more/different corrosive deposits, which requires the use of expensive nickel-based materials or coatings. This paper focuses on the behaviour of three different coatings (HVOF NiCrFeSi, laser clad FeCrAl and Laser Clad NiCrFeSi) deposited on TP347HFG, at 700°C (up to 1000 h exposure). Tests were performed using the ‘deposit recoat’ method (KCl deposit) in simulated biomass combustion environments. Cross-sections were analysed using dimensional metrology, to determine distributions of metal loss and internal damage. Intergranular damage and pits were identified using SEM/EDX. A ‘diffusion cell’ behaviour was observed, which led to depletion of alloying elements from the coating and consequent increase in damage. The results suggested a severe degradation of all coatings.

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生物质发电厂不同涂料炉边性能研究

能源部门将需要采用新的策略来减少温室气体排放，例如提高蒸汽温度/压力或使用低碳燃料(即生物质)。由于形成更多/不同的腐蚀性沉积物，两者都会导致热交换器材料的降解问题，这需要使用昂贵的镍基材料或涂层。本文重点研究了三种不同涂层(HVOF NiCrFeSi，激光熔覆FeCrAl和激光熔覆NiCrFeSi)在TP347HFG上在700°C(曝光1000小时)下的行为。在模拟生物质燃烧环境中，使用“沉积涂覆”方法(KCl沉积)进行了试验。横截面分析使用尺寸计量，以确定金属损失和内部损伤的分布。通过SEM/EDX分析发现了晶间损伤和凹坑。观察到“扩散池”行为，这导致涂层中合金元素的耗尽，从而导致损伤的增加。结果表明，所有涂层都发生了严重的降解。

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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.