Analysis on corrosion of low temperature reheater in a Russian-made power plant

ZHANG Guangwen; HU Yang; LIU Feng; WANG Dejun; ZHANG Cuiling; WANG Fengxian; LIU Yongbing

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Analysis on corrosion of low temperature reheater in a Russian-made power plant

Thermal Power Generation Issue 1, (2017)

更新时间：2025-09-28

- Analysis on corrosion of low temperature reheater in a Russian-made power plant
- 作者机构：
  
  1. 神华国华(北京)电力研究院有限公司,北京,100025
  2. 西安热工研究院有限公司,陕西,西安,710032
  3. 神华国华绥中发电有限责任公司,辽宁,葫芦岛,125200
  4. 神华国华盘山发电有限责任公司,天津,301900
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK224.9
- Published Online：24 January 2017，
  
  Published：2017
- 稿件说明：
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ZHANG Guangwen, HU Yang, LIU Feng, et al. Analysis on corrosion of low temperature reheater in a Russian-made power plant[J]. Thermal Power Generation, 2017, (1).
DOI：

ZHANG Guangwen, HU Yang, LIU Feng, et al. Analysis on corrosion of low temperature reheater in a Russian-made power plant[J]. Thermal Power Generation, 2017, (1). DOI：

摘要

针对国内俄供机组停备用期间各受热面均发生不同程度腐蚀

其中低温再热器入口段弯头部位腐蚀最为严重的问题，对某俄供机组低温再热器入口管的腐蚀情况进行了考察

并采用光学显微镜、扫描电镜、电子衍射能谱仪、X射线衍射分析仪等对腐蚀发生的位置、腐蚀产物的组成、形貌、成分进行了分析。结果表明

低温再热器入口管腐蚀的原因为机组停用过程中的溶解氧腐蚀。由于管段材质、位置结构、设计与实际安装使用存在差异

不当的停机过程中低温再热器入口管内会积存浓缩后的凝结水

其中腐蚀性阴离子Cl－、SO42－浓缩后会促进腐蚀的发展

空气中的氧促进了金属腐蚀的发生。因此

俄制机组在停机过程中

应避免低温再热器管路中凝结水的产生

考虑加入必要的停炉保护剂。

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