载流法制备硫酸露点腐蚀模拟气体的试验研究

doi:10.11903/1002.6495.2019.106

腐蚀科学与防护技术 DOI: 10.11903/1002.6495.2019.106

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载流法制备硫酸露点腐蚀模拟气体的试验研究

刘志峰¹,朱志平¹,石纯²,³,黄赵鑫¹,³

1. 长沙理工大学
2. 化学学院
3.

Experimental Study On Preparation of Sulfuric Acid Dew Point Corrosion Simulated Gas by Current Carrying Method

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摘要: 硫酸露点腐蚀是火电厂普遍存在而又棘手的问题，研究其机理、影响因素与防护方法意义重大。目前其研究上面临的主要障碍是如何获得可靠的硫酸露点腐蚀模拟气体，通过分析国内外硫酸露点腐蚀模拟气体产生方法的缺陷，提出了载流法产生模拟气体的方法，即对高浓度硫酸进行加热通N2，把硫酸蒸汽带入露点腐蚀模拟装置中。以电导率、SO42-为监测指标，讨论了硫酸体积、硫酸浓度、加热温度、N2流速对硫酸蒸汽产生效率的影响，结果表明：这是一种获取硫酸露点腐蚀的新方法，为硫酸露点腐蚀的机理与防护方法研究提供了方便。

关键词 ：露点腐蚀, 模拟气体, 硫酸蒸汽, 电导率, 载流法

Abstract：Sulfuric acid dew point corrosion is a common and difficult problem in thermal power plants. It is of great significance to study its mechanism, influencing factors and protection methods. The main obstacle currently facing its research is how to obtain a reliable sulfuric acid dew point corrosion simulation gas. By analyzing the defects of the simulated gas production method of sulfuric acid dew point corrosion at home and abroad, a method of generating simulated gas by the carrying method is proposed, when the high-concentration sulfuric acid is heated and N2 is introduced, and the sulfuric acid vapor is brought into the dew point corrosion simulation device. Based on the conductivity and SO42- as the monitoring index, the effects of sulfuric acid volume, sulfuric acid concentration, heating temperature and N2 flow rate on the production efficiency of sulfuric acid vapor were discussed. The results show that this is a new method for obtaining dew point corrosion of sulfuric acid, which is dew point corrosion of sulfuric acid. The mechanism and protection methods are convenient to study.

Key words： dew point corrosion simulated gas sulfuric acid vapor conductivity current carrying method

收稿日期: 2019-04-24

基金资助:湖南省科技计划重点项目

通讯作者: 朱志平

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引用本文:

刘志峰朱志平石纯黄赵鑫. 载流法制备硫酸露点腐蚀模拟气体的试验研究[J]. 腐蚀科学与防护技术, 10.11903/1002.6495.2019.106.

链接本文:

https://www.cspt.org.cn/CN/Y0/V/I/0

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