中国电机工程学报2023，Vol.43Issue(23)：9204-9213,10.DOI:10.13334/j.0258-8013.pcsee.222620
GH 3128和AISI 616在超临界二氧化碳布雷顿循环动力发电系统环境下的腐蚀行为
Corrosion Behavior of GH 3128 and AISI 616 for Supercritical Carbon Dioxide Brayton Cycle Power Generation System
摘要
Abstract
To study the corrosion of alloy materials for high-temperature components in supercritical carbon dioxide(S-CO2)Brayton cycle power generation system,and in order to further study the corrosion resistance of different types of alloys,the corrosion behavior of nickel-based alloy GH 3128 and martensitic alloy AISI 616 at 550℃ and 20MPa in S-CO2 environment for long-term(up to 900h)is investigated.The effect of stress loading on the corrosion behavior of the alloy is studied by using a four-point stress device.The microscopic morphology,oxide phase and oxide film thickness of the samples after the experiment are analyzed by SEM(Scanning electron microscope),XRD(X-ray Diffraction),and XPS(X-ray photoelectron spectroscopy).The experimental results show that the nickel-based alloy GH 3128 forms a single-layer Cr2O3 oxide film,while the martensitic alloy AISI 616 forms a double-layer oxide film structure,in which the outer layer is mainly Fe3O4,and the inner layer is Fe-rich and Cr-rich oxide.With the increase of corrosion time,the thickness of both oxide films increases,but the final thickness of GH 3128 is much smaller than that of AISI 616,and the amount of carburization is also small,while AISI 616 has obvious carburization.Stress loading can accelerate the corrosion rate of the alloy,increase the thickness of its oxide film,promote carburization,and change the structure of its corrosion products.Moreover,the effect of stress loading on AISI 616 is much higher than that of GH 3128.The results show that the resistance of nickel-based alloy GH 3128 to oxidation,carburizing and stress corrosion is higher than that of martensitic alloy AISI 616.Therefore,GH 3128 is recommended for S-CO2 Bryton cycle power generation systems at 550℃ and 20MPa.关键词
超临界二氧化碳/布雷顿循环/GH 3128/AISI 616/氧化/渗碳/应力Key words
supercritical carbon dioxide/Brayton cycle/GH 3128/AISI 616/oxidation/carburization/stress分类
金属材料引用本文复制引用
许梓源,杨其国,毛世杰,林卓越,武卫东,杨英英..GH 3128和AISI 616在超临界二氧化碳布雷顿循环动力发电系统环境下的腐蚀行为[J].中国电机工程学报,2023,43(23):9204-9213,10.基金项目
上海市地方院校能力建设计划项目(20060502000) （20060502000）
国家自然科学基金项目(52006146).Fund of Shanghai Capacity Building Program for Local Universities(20060502000) （52006146）
Project Supported by National Natural Science Foundation of China(52006146). （52006146）
