Effects of Surface Scratches on Corrosion Behaviors of Heat-Resistant Steels T92,TP347H and TP347HFG in High-Temperature CO<sub>2</sub>

doi:10.7652/xjtuxb202109014

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Effects of Surface Scratches on Corrosion Behaviors of Heat-Resistant Steels T92,TP347H and TP347HFG in High-Temperature CO₂

更新时间：2025-07-09

- Effects of Surface Scratches on Corrosion Behaviors of Heat-Resistant Steels T92,TP347H and TP347HFG in High-Temperature CO₂
- Vol. 55, Issue 9, Pages: 121-132(2021)
- 作者机构：
  
  西安交通大学热流科学与工程教育部重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202109014
  CLC： TL341
- Online First：10 September 2021，
  
  Published：2021
- 稿件说明：
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Effects of Surface Scratches on Corrosion Behaviors of Heat-Resistant Steels T92,TP347H and TP347HFG in High-Temperature CO₂[J]. 2021, 55(9): 121-132. DOI: 10.7652/xjtuxb202109014.
DOI：

Effects of Surface Scratches on Corrosion Behaviors of Heat-Resistant Steels T92,TP347H and TP347HFG in High-Temperature CO₂[J]. 2021, 55(9): 121-132. DOI: 10.7652/xjtuxb202109014. DOI：

摘要

针对热能动力设备结构材料在高温CO

环境下的潜在腐蚀问题

采用间隔取样对比法研究了表面存在划痕的耐热钢T92、TP347H和TP347HFG在600 ℃ CO

环境中的腐蚀行为。采用X射线衍射仪、扫描电镜和能谱分析仪对腐蚀产物的成分、分布及含量进行表征。实验结果表明:3种实验材料的腐蚀动力学曲线均遵循抛物线型规律; 材料表面划痕加剧了耐热钢T92的内氧化

导致TP347H和TP347HFG表面划痕内部出现剥落现象。根据腐蚀热力学计算

给出了TP347H在600 ℃ CO

环境中的Cr-C-O相图

明确了碳化物的分布。对比TP347H和TP347HFG发现晶粒细化加剧了渗碳行为

恶化了贫Cr区

破坏了富Cr氧化膜

从而降低了TP347HFG的抗腐蚀性能。

Abstract

Aiming at the potential corrosion problem of thermal power equipment structural materials in high temperature CO

environment

the interval sampling and comparison method was used to study the corrosion behaviors of the heat-resistant steels T92

TP347H and TP347HFG with scratches on the surface at 600 ℃ CO

environment. The composition

distribution and content of corrosion products were characterized by XRD

SEM and EDS. Experimental results show that the corrosion kinetic curves of the three experimental materials all follow a parabolic law. The surface scratches may aggravate the internal oxidation of the heat-resistant steel T92

and result

in spalling inside the scratches on the surface of TP347H and TP347HFG. According to corrosion thermodynamic calculations

the Cr-C-O phase diagram of TP347H in a CO

environment at 600 ℃ was given

and the distribution of carbides was clarified. Comparing TP347H and TP347HFG

it is found that the grain refinement intensifies the carburizing behavior

worsens the Cr-poor area and destroys the Cr-rich oxide film

thereby reducing the corrosion resistance of TP347HFG.

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⁰

Effects of Surface Scratches on Corrosion Behaviors of Heat-Resistant Steels T92,TP347H and TP347HFG in High-Temperature CO2

DOI：10.7652/xjtuxb202109014

摘要

Abstract

关键词

Keywords

references

Effects of Surface Scratches on Corrosion Behaviors of Heat-Resistant Steels T92,TP347H and TP347HFG in High-Temperature CO₂