传热管用Incoloy800H合金在模拟石墨粉尘环境中的碳化行为研究  

Carbonization Corrosion Behavior of Incoloy800H Alloy Used for Heat Transfer Tube in a Simulated Graphite Dust Environment

作　　者：黄锦阳[1] 鲁金涛[1] 邢瑞华 张醒兴 黄春林 徐雅欣 HUANG Jinyang;LU Jintao;XING Ruihua;ZHANG Xingxing;HUANG Chunlin;XU Yaxin(National Engineering Research Center of Integration and Maintenance of Clean and Low-carbon Thermal Power Generation System,Xi'an Thermal Power Research Institute Co.Ltd.,Xi'an 710032,China;School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,China;College of Material Science and Engineering,Xi'an University of Science and Technology,Xi′an 710054,China)

机构地区：[1]西安热工研究院有限公司清洁低碳热力发电系统集成及运维国家工程研究中心,西安710032 [2]西北工业大学材料学院凝固技术国家重点实验室,西安710072 [3]西安科技大学材料科学与工程学院,西安710054

出　　处：《中国腐蚀与防护学报》2023年第2期365-370,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：陕西省自然科学基础研究计划(2020JM-716);中国华能集团有限公司科技项目(HNKJ20-H43)。

摘　　要：利用透射电子显微镜(TEM)、扫描电子显微镜(SEM)以及X射线衍射仪(XRD)等手段对Incoloy800H合金在650 oC饱和石墨粉尘环境中的碳化行为及其机制开展了研究。结果表明:Incoloy800H合金的碳化腐蚀深度曲线遵循抛物线规律,腐蚀速率常数为0.013μm/s1/2,腐蚀产物层厚度随腐蚀时间的延长而增加;碳化3000 h后,合金表面腐蚀产物层主要以尖晶石相MnCr_(2)O_(4)和碳化物(CrAlMn)xCy为主,碳化层内颗粒状腐蚀产物为MnCr_(2)O_(4)、M23C6以及Al_(2)O_(3),且主要沿晶界分布;晶界碳化-氧化是导致合金腐蚀进程加剧的关键因素。The carbonization corrosion behavior of Incoloy800H alloy was studied in a saturated graphite dust environment at 650 ℃ by means of transmission electron microscope, scanning electron microscope and X-ray diffractometer. The results show that the carbonization corrosion depth versus time curve of Incoloy 800H alloy followed parabolic law, and the rate constant of carbonization corrosion is 0.013 μm/s1/2. The thickness of corrosion product layer increased with the prolonging of corrosion time. After corrosion for 3000 h, the corrosion products on Incoloy800H alloy surface composed mainly of MnCr_(2)O_(4)spinel and(CrAlMn)xCycarbide, while the granular products in the internal carbonization zone was confirmed as MnCr_(2)O_(4), M23C6and Al_(2)O_(3), distributing along the grainboundaries.The key factors, which aggravate the corrosion process of Incoloy800H alloy, was the carbonization-oxidation of grain boundaries.

关 键 词：蒸汽发生器 Incoloy800H 碳化 晶界腐蚀 石墨粉 

分 类 号：TG172[金属学及工艺—金属表面处理]