摘要
为了解决太阳能热发电中存在的腐蚀行为,从腐蚀机理和影响因素两方面分析了硝酸盐熔盐流体中存在的金属腐蚀行为。理论计算显示,当O^(2-)浓度小于23或者材料电极电压低于-1.6 V时,在碳钢材料表面才能生成稳定的耐腐蚀性氧化层。为了进一步分析金属材料在硝酸盐熔盐流体中的腐蚀问题,从硝酸熔盐的工作温度、杂质、成分变化、金属材料的成分和组织、表面涂层等方面系统阐述了其腐蚀过程,并对太阳能热发电的腐蚀发展进行了展望。
In order to solve the corrosion behavior in solar thermal power generation,the metal corrosion behavior in molten salt fluid was analyzed from two aspects of corrosion mechanism and influencing factors.The theoretical calculation shows that when the O^(2-)concentration is less than 23 or the electrode voltage is lower than-1.6 V,a stable corrosion-resistant oxide layer can be formed on the surface of carbon steel.In order to further analyze the corrosion of metal materials in nitrate molten salt fluid,this paper systematically describes the corrosion process of molten nitrate from the aspects of working temperature,impurities,composition change of metal materials,composition and structure of metal materials,surface coating,etc.,and prospects the development of solar thermal power generation.
作者
张恩耀
崔珊
周鹏
党杰
ZHANG Enyao;CUI Shan;ZHOU Peng;DANG Jie(Xi’an Aeronautical Polytechnic Institute,Xi’an 710089,China)
出处
《化工科技》
CAS
2021年第1期71-76,共6页
Science & Technology in Chemical Industry
基金
陕西省高校青年创新团队项目(2019-73)。
关键词
太阳能热发电
熔盐腐蚀
硝酸盐熔盐
Solar thermal power generation
Molten salt corrosion
Molten nitrate
