Hot Corrosion of Porous NiCr Alloy With NaCl Deposit at 750°C

CHEN Lingyun; LAN Hao; HUANG Chuanbing; YANG Bin

doi:10.16080/j.issn1671-833x.2017.08.032

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Hot Corrosion of Porous NiCr Alloy With NaCl Deposit at 750°C

更新时间：2026-04-17

- Hot Corrosion of Porous NiCr Alloy With NaCl Deposit at 750°C
- Aeronautical Manufacturing Technology Vol. 60, Issue 8, Pages: 32-36(2017)
- 作者机构：
  
  1. 北京科技大学新金属材料国家重点实验室,北京,100083
  2. 中国科学院过程工程研究所多相复杂系统国家重点实验室,北京,100190
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2017.08.032
  CLC：
- Published：2017
- 稿件说明：
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陈凌云1,2，兰昊2，黄传兵2，杨滨1,3，房师阁2，张伟刚2. 多孔NiCr在750℃ NaCl沉积盐中的热腐蚀机理研究*[J]. 航空制造技术, 2017, 60(8): 32-36.

CHEN Lingyun1,2, LAN Hao2, HUANG Chuanbing2, YANG Bin1,3, FANG Shige2, ZHANG Weigang2. Hot Corrosion of Porous NiCr Alloy With NaCl Deposit at 750°C. Aeronautical Manufacturing Technology, 2017, 60(8): 32-36.
陈凌云1,2，兰昊2，黄传兵2，杨滨1,3，房师阁2，张伟刚2. 多孔NiCr在750℃ NaCl沉积盐中的热腐蚀机理研究*[J]. 航空制造技术, 2017, 60(8): 32-36. DOI： 10.16080/j.issn1671-833x.2017.08.032.

CHEN Lingyun1,2, LAN Hao2, HUANG Chuanbing2, YANG Bin1,3, FANG Shige2, ZHANG Weigang2. Hot Corrosion of Porous NiCr Alloy With NaCl Deposit at 750°C. Aeronautical Manufacturing Technology, 2017, 60(8): 32-36. DOI： 10.16080/j.issn1671-833x.2017.08.032.

摘要

针对飞机发动机高压压气机NiCr 系可磨耗封严涂层发生的NaCl 热沉积盐高温腐蚀现象，采用粉末烧结法制备了多孔80Ni20Cr 合金，研究了其在750℃空气气氛中的NaCl 热腐蚀行为。采用X 射线衍射和能谱分析等技术对腐蚀产物进行了分析。结果表明，NaCl 固体盐通过阻碍合金表面生成连续致密的Cr2O3，加速多孔NiCr 的腐蚀和氧化。研究发现，在样品外表面形成的Cr2O3、NiO、NiCr2O4 混合氧化物膜易开裂剥落，是合金加速腐蚀的主要方式。此外，通过同步热分析并结合热力学模拟计算发现，NiCr 合金的热腐蚀由氯化- 氧化协同控制，初始依靠NaCl 与 Cr 元素反应引发合金的循环腐蚀，并推动整个腐蚀过程不断进行。

Abstract

In order to elucidate NaCl-induced hot corrosion of NiCr-based abradable coatings in high-pressure compressor

the porous 80Ni20Cr alloy was prepared by powder metallurgic process. The hot corrosion of porous NiCr alloy with NaCl deposit at 750°C was investigated by SEM

EDS and XRD. Results show that NaCl accelerates the oxidation of NiCr alloy by preventing the formation of continuous and compact Cr2O3. And cracks can be observed in the oxide scale which consists of Cr2O3

NiO and NiCr2O4. Furthermore

the corrosion mechanism is also discussed by TG-DSC and thermodynamics calculations. Cr could react with NaCl

accelerating the corrosion of NiCr porous alloy by chlorination and oxidation.

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