Corrosion characteristics of superheater subjected to gas phase in waste plastic fired boilers

SANG Shenghuan; DUAN Yufeng; CHEN Huichao; MAO Yongqiu; ZHANG Pingping Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education

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Corrosion characteristics of superheater subjected to gas phase in waste plastic fired boilers

更新时间：2025-09-28

- Corrosion characteristics of superheater subjected to gas phase in waste plastic fired boilers
- Thermal Power Generation Vol. 42, Issue 8, Pages: 119-123(2013)
- 作者机构：
  
  东南大学能源热转换及其过程测控教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK224.9
- Published：2013
- 稿件说明：
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SANG Shenghuan, DUAN Yufeng, CHEN Huichao, et al. Corrosion characteristics of superheater subjected to gas phase in waste plastic fired boilers[J]. Thermal power generation, 2013, 42(8): 119-123.
DOI：

SANG Shenghuan, DUAN Yufeng, CHEN Huichao, et al. Corrosion characteristics of superheater subjected to gas phase in waste plastic fired boilers[J]. Thermal power generation, 2013, 42(8): 119-123. DOI：

摘要

在模拟烟气的条件下

于管式炉中采用腐蚀增重法研究了低参数循环流化床(CFB)锅炉过热器常用材料20G在不同盐酸浓度(0.1%～0.2%)及温度(500～600℃)下的腐蚀特性

并进行动力学分析。结果表明:随着反应温度和HCl浓度的增加

20G耐腐蚀性能总体上降低;在金属表面形成的腐蚀膜呈分层结构

Cl元素由内向外含量降低

外层主要成分为Fe2O3

含有少量的Fe3O4;HCl浓度0.1%、500℃时的腐蚀产物为针状

温度越高针状结构越大。因此

在温度高于600℃、HCl浓度大于0.2%时

20G不适用于抗蚀材料。

Abstract

The corrosion weight method was adopted to investigate the corrosion characteristics of G20

the common material for superheaters in low parameter CFB boilers in tube furnace under simulated flue gas condition

with different HCl concentrations(from 0.1%to 0.2%)and temperatures(from 500℃to 600℃).Metal specimens after corrosion tests were analyzed by SEMEDS and XRD to detect the appearance and composition of corrosion products.Moreover

kinetic analysis was also conducted.The results showed that

with an increase in the reaction temperature and HCl concentration

the anti-corrosion performance of 20Gdecreased generally.The corrosion film on metal surface showed a layered structure;the content of Cl decreased from inside to outside

and the outside layer mainly consisted of Fe2O3and a small amount of Fe3O4.The corrosion products took on a needle-like structure at 0.1% HCl concentration and this shape became bigger when the temperature increased.Therefore

at temperature of 600℃

and with the HCl concentration larger than 0.2%

20Gis not suitable for erosion resistant.

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