摘要
熔融盐以其优良的性能在太阳能热发电站中常被用作储热和蓄热介质,然而由于蓄热的熔融盐工作温度高达500?600℃,这就使得熔融盐对蓄热系统材料的腐蚀成为一个关键问题。本文以美国新月沙丘塔式熔盐太阳能热电站为原型,针对其运行情况,自主设计并搭建旋转式高温NaNO3/KNO3二元熔盐腐蚀特性模拟实验系统,探究了304不锈钢在特定温度、不同流速、不同时间协同作用下的腐蚀动力学特性,并利用SEM、EDX、XRD等分析测试技术探索材料表面的微观腐蚀形貌和腐蚀产物形态及元素组成,揭示了304不锈钢在高温流动熔融盐中的腐蚀行为规律和腐蚀机理。
Molten Salt is often used as the thermal energy storage(TES) medium in solar power stations for its excellent properties,while the temperature is up to 500~600℃,which makes the corrosion on materials of heat storage system a key problem.In this study,an exclusive(corrosion system of flowing molten NaNO3/KNO3 binary salt) experimental device was designed and built to investigate the corrosion dynamic characteristics of 304 stainless steel sample under the synergistic effect of different flow rate and time period for Crescent Dunes Tower Molten Salt concentrating Solar Power(CSP) plant in USA.And the micro corrosion morphology,corrosion product form and elements were explored by such measuring instruments as SEM,EDX and XRD to reveal the corrosion behavior and mechanism of 304 stainless steel in high temperature molten salt flow.
作者
王晓丹
王跃社
隆世明
WANG Xiao-Dan;WANG Yue-She;LONG Shi-Ming(State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Downhole Technology Operation Company,CNPC Chuanqing Drilling Engineering Co.Ltd.,Xianyang 712000,China;National Engineering Laboratory for Exploration and Development of Low-Permeability Oil&GasFields,Xianyang 712000,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2020年第3期674-679,共6页
Journal of Engineering Thermophysics
关键词
二元熔盐
流动腐蚀
304不锈钢
molten binary salt
flow induced corrosion
304 stainless steel
