T122、Super304H和HR3C在1000MW超超临界电厂运行15年后的高温腐蚀数据及机理

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

Materials at High Temperatures Pub Date : 2023-01-02 DOI:10.1080/09603409.2023.2175156

Haomin Wu, Shuo Wang, Qinxin Zhao, Z. Liang

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引用次数: 0

摘要

对某1000mw超超临界电厂机组进气用耐热钢T122、Super304H和HR3C进行了15年的高温腐蚀试验研究。蒸汽温度约610℃，压力约28 MPa。利用x射线衍射仪和扫描电子显微镜及能谱仪分析了腐蚀产物的形貌和相组成。结果表明:炉侧腐蚀产物厚度大于炉侧腐蚀产物厚度，这是由于烟气中硫的存在造成的。腐蚀产物的厚度顺序为T122 > Super304H > HR3C。三管两侧腐蚀产物存在微裂纹和孔洞等缺陷，导致腐蚀产物析出。

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High-temperature corrosion data and mechanisms for T122, Super304H and HR3C after 15 years in 1000MW ultra-supercritical power plant

ABSTRACT The high-temperature corrosion of heat-resistant steels T122, Super304H and HR3C used for the inlet of a header in a 1000 MW ultra-supercritical power plant for 15 years was investigated. The steam temperature and pressure were about 610 °C and 28 MPa, respectively. The morphology and phase compositions of the corrosion products formed on the investigated tubes were analysed using X-ray diffraction and a scanning electron microscope with an energy dispersive spectroscopy detector. The results showed that the thickness of the corrosion products on the tube fireside was larger than that on the steam-side of the investigated tubes, which was due to the sulphur in the flue gas. The thickness rank of the corrosion products on the investigated steels was T122 > Super304H > HR3C. Defects including micro-cracks and voids were found in the corrosion products on both sides of the three tubes, which led to the breakaway of corrosion products.

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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.