沉积物形成对桉木锅炉高温过热器腐蚀的影响

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

Materials at High Temperatures Pub Date : 2022-11-15 DOI:10.1080/09603409.2022.2146315

Yuwei Wei, Yunkun Kuang, Guo-Li Li, Weichao Li, Weichong Chen, Jianxiong Han, Kun Zhang, Lin Zhu, Yongjun Li

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引用次数: 1

摘要

桉树生物质锅炉通常会遇到严重的沉积物形成问题，并且由于桉树生物质中含有大量碱和氯，预计会在高温下遭受严重的过热器腐蚀。本文讨论了桉树锅炉独特的沉积层结构及其腐蚀机理。研究发现，桉树生物质锅炉在受热面形成了独特的三明治状细胞膜结构。氯起到催化剂的作用，使反应循环，造成严重的腐蚀。腐蚀层与基体交界处的氧化物主要沿基体晶界渗透，形成独特的网状结构。12Cr2MoWVTiB钢管基体沿晶界有明显的内氧化和传质，而SA213T91钢管由于晶粒细小均匀，没有明显的内氧化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Influence of deposit formation on corrosion at the high-temperature superheater of eucalyptus-fired boiler

ABSTRACT Eucalyptus biomass-fired boilers generally experience severe problems with deposit formation and are expected to suffer from severe superheater corrosion at high temperatures due to the large alkali and chlorine content in eucalyptus biomass. The unique deposition layer structure and corrosion mechanism of eucalyptus-fired boilers are discussed in this paper. It was found that a unique sandwich like cell-membrane structure on the heating surface was formed in eucalyptus biomass-fired boilers. Chlorine acts as a catalyst, circulates the reaction and causes serious corrosion. The oxides at the junction of the corrosion layer and the matrix mainly penetrate along the grain boundary of the matrix, forming a unique network structure. There is obvious internal oxidation and mass transfer along the grain boundary in the matrix of 12Cr2MoWVTiB steel pipe, and no obvious internal oxidation in SA213T91 steel pipe due to its fine and uniform grains.

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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.