Corrosion behavior of chlorine ions under all volatile treatment conditions of subcritical drum boilers

SONG Fei; SUN Hao; TIAN Li; DENG Yuqiang; LIU Feng

English

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Corrosion behavior of chlorine ions under all volatile treatment conditions of subcritical drum boilers

Thermal Power Generation Vol. 45, Issue 3, Pages: 82-86(2016)

更新时间：2025-09-28

- Corrosion behavior of chlorine ions under all volatile treatment conditions of subcritical drum boilers
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.8
- Published：2016
- 稿件说明：
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SONG Fei, SUN Hao, TIAN Li, et al. Corrosion behavior of chlorine ions under all volatile treatment conditions of subcritical drum boilers[J]. Thermal Power Generation, 2016, 45(3): 82-86.
DOI：

SONG Fei, SUN Hao, TIAN Li, et al. Corrosion behavior of chlorine ions under all volatile treatment conditions of subcritical drum boilers[J]. Thermal Power Generation, 2016, 45(3): 82-86. DOI：

摘要

模拟亚临界汽包炉全挥发处理(AVT)环境

在高温无氧碱性条件下

采用电化学和试片表面金相分析方法

对氯离子(Cl-)在水冷壁管内表面(向火侧)发生浓缩时的腐蚀情况

包括不同Cl-质量浓度对金属表面钝态膜的影响

进行了研究。结果表明:当Cl-质量浓度≤3.00mg/L时

金属膜电阻较大

金属膜完整;当Cl-质量浓度3.00mg/L时

金属膜电阻急剧减小

金属表面出现点蚀

且随Cl-质量浓度增大

金属表面腐蚀加重。

Abstract

Under all volatile treatment(AVT)working conditions of subcritical drum boiler

in high temperature anaerobic alkaline environment

the effect of Cl-on passive film on metal surface when Cl-was concentrated in the inner surface of the wall tube(the side facing the fire)was investigated

by electrochemical online test and the surface topography images.The results show that

when the Cl-concentration is equal or lower than 3.00mg/L

the metal film resistance is large and the metal film is complete.While when the Cl-concentration is higher than 3.00mg/L

the metal film resistance drops sharply

and pitting corrosion occurs on the metal surface.Moreover

the corrosion on the metal surface gets severe with the increasing Cl-concentration.

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