炉边腐蚀对Super304H炉管蠕变断裂寿命及氧化皮组织的影响

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Pub Date : 2023-05-22 DOI:10.5006/4277

Xiaofeng Yang, Yaxin Xu, Jin-Tao Lu, Dangdang Ying, Jinyang Huang, Wenya Li

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引用次数: 1

摘要

研究了商用Super304H在650°C炉边腐蚀（煤灰和烟气）和静态空气环境中的蠕变断裂寿命。结果表明，在不同应力水平下，炉边腐蚀条件下的蠕变断裂寿命比空气中的蠕变断裂寿期缩短26.5%-83.3%。对腐蚀产物的组成、形态和分布以及基体的微观结构进行了表征，研究了炉边腐蚀对蠕变断裂寿命的影响。炉边腐蚀引起的氧化皮剥落和严重的表面裂纹对合金的蠕变性能不利。蠕变试验过程中，内部硫化物的形成促进了基体中晶间裂纹的萌生和扩展。Super304H在炉边腐蚀中的这些降解导致了早期蠕变断裂。

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Impact of fireside corrosion on creep rupture life and oxide scale structure of Super304H boiler tube

The creep rupture life of commercial Super304H in fireside corrosion (coal ash and flue gas) and static air environment at 650 °C was investigated. Results showed that the creep rupture life under fireside corrosion condition decreases by 26.5%-83.3% at different stress levels, comparing with that in air. The corrosion products, including their composition, morphology and distribution, and the microstructure of substrate were characterized to research the impact of the fireside corrosion on the creep rupture life. The exfoliation of oxide scales and serious surface cracking resulted from fireside corrosion were detrimental for creep properties of the alloy. The formation of internal sulfides promoted the initiation and propagation of intergranular cracks in the substrate during creep tests. These degradations of Super304H in fireside corrosion contributed to the premature creep rupture.

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来源期刊

Corrosion MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

2.80

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： CORROSION is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control. The scope of the journal includes the latest developments in areas of corrosion metallurgy, mechanisms, predictors, cracking (sulfide stress, stress corrosion, hydrogen-induced), passivation, and CO2 corrosion. 70+ years and over 7,100 peer-reviewed articles with advances in corrosion science and engineering have been published in CORROSION. The journal publishes seven article types – original articles, invited critical reviews, technical notes, corrosion communications fast-tracked for rapid publication, special research topic issues, research letters of yearly annual conference student poster sessions, and scientific investigations of field corrosion processes. CORROSION, the Journal of Science and Engineering, serves as an important communication platform for academics, researchers, technical libraries, and universities. Articles considered for CORROSION should have significant permanent value and should accomplish at least one of the following objectives: • Contribute awareness of corrosion phenomena, • Advance understanding of fundamental process, and/or • Further the knowledge of techniques and practices used to reduce corrosion.