Fire-side corrosion behavior of Alloy 617 Bused for 700 ℃ ultra-supercritical unit boiler

BI Kai; ZHOU Rongcan; TANG Liying

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Fire-side corrosion behavior of Alloy 617 Bused for 700 ℃ ultra-supercritical unit boiler

Thermal Power Generation Vol. 45, Issue 2, Pages: 68-74(2016)

更新时间：2025-09-28

- Fire-side corrosion behavior of Alloy 617 Bused for 700 ℃ ultra-supercritical unit boiler
- 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： TM621.2
- Published：2016
- 稿件说明：
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BI Kai, ZHOU Rongcan, TANG Liying. Fire-side corrosion behavior of Alloy 617 Bused for 700 ℃ ultra-supercritical unit boiler[J]. Thermal Power Generation, 2016, 45(2): 68-74.
DOI：

BI Kai, ZHOU Rongcan, TANG Liying. Fire-side corrosion behavior of Alloy 617 Bused for 700 ℃ ultra-supercritical unit boiler[J]. Thermal Power Generation, 2016, 45(2): 68-74. DOI：

摘要

使用自制的烟气腐蚀试验装置

在模拟燃用贵州六枝烟煤的烟气/煤灰环境中

研究700℃时617B合金的腐蚀行为。通过光学显微镜、扫描电镜、X射线能谱和X射线衍射

对617B合金的腐蚀层形貌、成分和物相组成进行分析。结果表明:试验前120h

617B合金表面生成了具有保护作用的Cr2O3保护膜

腐蚀速率低;之后

腐蚀速率增大

腐蚀层物相主要为NiCr2O4和少量的CoCr2O4。

Abstract

Fire-side corrosion behavior of Alloy 617 Bat 700℃ was evaluated in stimulated coal-ash and flue gas environment firing Liuzhicoal with high S content

on a self-built lfue gas corrosion test device.The morphology

composition and phase constitution of the Alloy 617 Bwere characterized through several analysis

such as the light optical microscopy(LOM)

scanning electron microscopy(SEM)

energy dispersive X-ray spectroscope(EDX)and X-ray diffraction(XRD).The results show that

aprotective Cr2O3 layer formed on the Alloy 617 Bsurface during the initial stage(within 120h)with a low corrosion rate.Then the corrosion rate increased

the specimen suffered severe corrosion

and the production on the Alloy 617 B surface is mainly NiCr2O4 and a little CoCr2O4.

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