Fireside corrosion behavior of Haynes 282 alloy in simulated boiler environments firing high sulfur content coal

LI Jiang; ZHOU Rongcan; TANG Liying; LI Ji; ZHANG Zhoubo; HOU Shufang; WANG Bohan

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Fireside corrosion behavior of Haynes 282 alloy in simulated boiler environments firing high sulfur content coal

更新时间：2025-09-28

- Fireside corrosion behavior of Haynes 282 alloy in simulated boiler environments firing high sulfur content coal
- Thermal Power Generation Vol. 46, Issue 10, Pages: 30-35(2017)
- 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： TG172
- Published：2017
- 稿件说明：
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LI Jiang, ZHOU Rongcan, TANG Liying, et al. Fireside corrosion behavior of Haynes 282 alloy in simulated boiler environments firing high sulfur content coal[J]. Thermal power generation, 2017, 46(10): 30-35.
DOI：

LI Jiang, ZHOU Rongcan, TANG Liying, et al. Fireside corrosion behavior of Haynes 282 alloy in simulated boiler environments firing high sulfur content coal[J]. Thermal power generation, 2017, 46(10): 30-35. DOI：

摘要

为了研究先进超超临界候选合金在燃用我国典型煤种的烟气/煤灰条件下的腐蚀行为和机理

本文以700℃先进超超临界机组锅炉关键部件候选材料镍基合金Haynes 282为研究对象

在模拟燃用国产高硫煤的650、700、750℃烟气/煤灰腐蚀环境中进行烟气腐蚀试验

通过腐蚀动力学曲线、X射线衍射、扫描电镜、X射线能谱研究了其高温烟气腐蚀行为及腐蚀产物生成机理。结果表明:在650℃时腐蚀速率最低

机理以高温氧化为主

腐蚀产物主要为Cr_2O_3;700、750℃时

合金均发生一定程度第二类硫酸盐型热腐蚀

腐蚀产物均呈内外双层结构

外层富O、Ni、Co

内层富O、Cr、S、Mo;700℃时腐蚀速率最快

低熔点共晶盐挥发程度加剧导致了750℃时腐蚀速率略有下降

650℃时腐蚀速率最低。

Abstract

To investigate the corrosion behavior and mechanism of candidate alloy for advanced ultra supercritical units firing typical coals in China

the Haynes 282

a candidate nickel-base alloy for key components of 700 ℃advanced ultra-supercritical(A-USC) boilers

was taken as the research object to carry out flue gas corrosion test in simulated flue gas/ash environments firing domestic high sulfur content coal at 650 ℃

700 ℃and 750 ℃. Through the corrosion kinetic curves

X-ray diffraction(XRD)

scanning electron microscope(SEM) and X-ray energy spectrum(EDS)

the corrosion behaviour and products formation mechanism of the Haynes 282 were investigated. The results indicat that

the corrosion rate was the lowest at 650 ℃

high temperature oxidation mainly occurred at this temperature and the major corrosion product was Cr2 O3. Type-Ⅱ sulfate hot corrosion occurred at 700 and 750 ℃ ℃. The corrosion product's double-corrosion-layer structure was observed

with O

Co rich in the outer layer and O

Mo rich in the inner layer. The corrosion rate was the highest at 700 ℃.The corrosion rate at 750 was lower due to the ℃ intensing volatilization of eutectic salts withlow melting point.

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