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中国腐蚀与防护学报  2024, Vol. 44 Issue (6): 1399-1411     CSTR: 32134.14.1005.4537.2024.002      DOI: 10.11902/1005.4537.2024.002
  研究报告 本期目录 | 过刊浏览 |
潮湿空气中应力耦合固态NaCl作用下GH4169合金的中温腐蚀行为研究
王文泉1, 崔宇2(), 薛蕴鹏3, 刘莉1, 王福会1
1.东北大学 沈阳材料科学国家研究中心联合研究分部 沈阳 110819
2.中国科学院金属研究所 师昌绪先进材料创新中心 沈阳 110016
3.中国航发沈阳黎明航空发动机有限责任公司 沈阳 110862
Corrosion Behavior of GH4169 Alloy Under Flexural Tensile Stress and Beneath a NaCl Deposit Film in Water Vapor Containing Air at 600oC
WANG Wenquan1, CUI Yu2(), XUE Yunpeng3, LIU Li1, WANG Fuhui1
1. Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, China
2. Shi -changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
3. AECC Shenyang Liming Aero-engine Co., Ltd., Shenyang 110862, China
引用本文:

王文泉, 崔宇, 薛蕴鹏, 刘莉, 王福会. 潮湿空气中应力耦合固态NaCl作用下GH4169合金的中温腐蚀行为研究[J]. 中国腐蚀与防护学报, 2024, 44(6): 1399-1411.
Wenquan WANG, Yu CUI, Yunpeng XUE, Li LIU, Fuhui WANG. Corrosion Behavior of GH4169 Alloy Under Flexural Tensile Stress and Beneath a NaCl Deposit Film in Water Vapor Containing Air at 600oC[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(6): 1399-1411.

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摘要: 

模拟了近海服役的飞机发动机压气机叶片的运行环境，研究了叶片典型材料GH4169在600℃潮湿空气中受固态NaCl耦合应力载荷作用影响的腐蚀行为及机制。结果表明，应力加速了GH4169在该环境中的腐蚀，使合金表面生成了NiCr2O4、NaNbO3、Fe2O3、NiO、Cr2O3、Al2O3及NiFe2O4等腐蚀产物的混合物。应力促使GH4169发生了活化内腐蚀，内腐蚀产物为不连续颗粒状Cr2O3以及少量Fe2O3和NbO。经标准制度热处理的GH4169倾向于发生不均匀沿晶内腐蚀，固溶热处理的GH4169为相对均匀的内腐蚀带。活化腐蚀过程导致基体中产生了贫Cr区和贫Fe区，在该区域中Cr及Fe空位导致Ni-Cr-Fe晶胞的稳定性下降。
关键词 ： GH4169,  NaCl,  内腐蚀,  弹性应力    
Abstract：

Corrosion behavior of high temperature alloy GH4169 under tensile stress while beneath a solid NaCl deposit film was studied in water vapor containing air at 600°C to simulate the service conditions of aircraft engine compressors in the marine environment. The results show that the applied tensile stress accelerates the corrosion of GH4169 in the environment, resulting in the formation of a complex mixture of NiCr2O4, NaNbO3, Fe2O3, NiO, Cr2O3, Al2O3 and NiFe2O4 on the alloy surface. The applied tensile stress could induce active internal corrosion of GH4169. The internal corrosion products were discontinuous granular Cr2O3 and a small amount of Fe2O3 and NbO. After normal heat treatment the GH4169 alloy tends to have non-uniform intergranular corrosion, while the solid-solution heat-treated ones exhibited a relatively uniform internal corrosion zone. The active corrosion process leads to the formation of Cr and Fe depletion regions in the matrix, and the Cr and Fe vacancies in this region lead to the deteriorated stability of Ni-Cr-Fe cells.
Key words： GH4169    NaCl    internal corrosion    elastic stress
收稿日期: 2024-01-02      32134.14.1005.4537.2024.002
ZTFLH:  TG174  
基金资助:国家自然科学基金联合基金(重点)(U22A20111)
通讯作者: 崔宇，E-mail: ycui@imr.ac.cn，研究方向为海洋中温环境金属腐蚀与防护
Corresponding author: CUI Yu, E-mail: ycui@imr.ac.cn
作者简介: 王文泉，男，1994年生，博士生
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https://www.jcscp.org/CN/10.11902/1005.4537.2024.002      或      https://www.jcscp.org/CN/Y2024/V44/I6/1399

图1  经标准热处理和固溶热处理后GH4169合金的金相组织及晶粒尺寸统计
图2  实验装置图[4]
图3  ANSYS模拟计算的受力及应变状态
图4  表面沉积NaCl的GH4169合金在潮湿的600℃环境下受0、600和800 MPa应力载荷影响腐蚀20 h后的宏观表面形貌
图5  标准制度热处理的GH4169合金在含有固态NaCl的潮湿的600℃环境下受不同应力载荷影响腐蚀20 h后的表面形貌
图6  固溶热处理的GH4169合金在含有固态NaCl的潮湿的600℃环境下受不同应力载荷影响腐蚀20 h后的表面形貌
图7  GH4169合金在含有固态NaCl的潮湿的600℃环境下受不同应力载荷影响下腐蚀20 h后表面腐蚀产物的XRD谱
图8  表面沉积NaCl的GH4169合金在潮湿的600℃环境下受不同应力载荷影响腐蚀20 h后的截面形貌
图9  振动抛光后的标准制度热处理GH4169合金内腐蚀形貌
图10  GH4169合金在潮湿的600℃环境下受600 MPa应力载荷影响下腐蚀20 h后的截面元素分布
图11  HSC Chemistry 5计算600℃金属元素-Cl-O相稳定性图[23]
图12  基于GH4169合金元素含量建立的Ni-Cr-Fe及含空位的合金晶胞
图13  Ni-Cr-Fe模型合金晶胞及含有Cr、Fe空位的合金晶胞的稳定性
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