低温轧制态与退火态CrCoNi中熵合金在3.5%NaCl溶液中的腐蚀行为

陈今良, 韩嘉平, 刘箫

doi:10.16577/j.issn.1001-1560.2024.0199

材料保护 >

2024 , Vol. 57 >Issue 9: 36 - 44

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0199

研究篇

低温轧制态与退火态CrCoNi中熵合金在3.5%NaCl溶液中的腐蚀行为

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攀枝花学院钒钛学院

陈今良(1983-)，博士，讲师，主要从事高熵合金理论研究，E-mail:chenjinliang2011＠126.com

收稿日期: 2023-12-14

修回日期: 2024-04-09

录用日期: 2024-04-10

网络出版日期: 2024-11-14

基金资助

攀枝花市科技项目(2022ZD-G-14)；攀枝花学院校级项目(2021YB009)

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Corrosion Behavior of Low Temperature Rolled and Annealed CrCoNi Medium Entropy Alloys in 3.5%NaCl Solution

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(Institute of Vanadium and Titanium， Panzhihua University， Panzhihua 617000， China)

CHEN Jinliang (1983-)， Ph.D.， Lecturer， Research Focus: High Entropy Alloy Theory Research， E-mail:chenjinliang2011＠126.com

Received date: 2023-12-14

Revised date: 2024-04-09

Accepted date: 2024-04-10

Online published: 2024-11-14

Supported by

Technology Project of Panzhihua City (2022ZD-G-14)；Panzhihua University Project (2021YB009)

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摘要

为了研究低温轧制态与退火态CrCoNi 中熵合金在NaCl 溶液中的耐腐蚀性能，对低温(-196 ℃)轧制变形的CrCoNi 中熵合金进行800 ℃×30 min 退火处理，采用金相显微镜、透射电子显微镜、原子力显微镜、光电子能谱仪、电化学工作站等测试手段对低温轧制态与退火态试样在3.5%(质量分数)NaCl 溶液中的耐蚀性进行了表征分析。结果表明:低温轧制态试样的耐腐蚀性较差，经800 ℃×30 min 退火后，试样的耐腐蚀性显著提高；由于轧制态合金退火后发生再结晶行为，导致晶粒细化，合金表面钝化膜中Cr2O3与Cr(OH)3的含量增加，从而使合金的耐腐蚀性得到改善。

关键词： CrCoNi 中熵合金; 液氮温度; 轧制; 退火; 耐蚀性; 钝化膜

本文引用格式

陈今良, 韩嘉平, 刘箫 . 低温轧制态与退火态CrCoNi中熵合金在3.5%NaCl溶液中的腐蚀行为[J]. 材料保护, 2024 , 57(9) : 36 -44 . DOI: 10.16577/j.issn.1001-1560.2024.0199

Abstract

In order to study the corrosion resistance of low-temperature rolled and annealed CrCoNi medium entropy alloy in NaCl solution， the CrCoNi medium entropy alloy deformed by low-temperature (-196 ℃) rolling was annealed at 800 ℃for 30 min.The corrosion resistance of low-temperature rolled and annealed samples in 3.5%(mass fraction) NaCl solution was characterized and analyzed by metallographic microscope， transmission electron microscope， atomic force microscope， photoelectron spectrometer， electrochemical workstation and other testing methods.Results showed that the corrosion resistance of low-temperature rolled samples was poor.After annealing at 800 ℃for 30 min， the corrosion resistance of the samples was significantly improved.Owing to the recrystallization behavior of the rolled state alloy after annealing，grain refinement occurred， and the content of Cr2O3 and Cr(OH)3 in the passivation film on the alloy surface increased， thereby improving the corrosion resistance of the alloy.

Key words： CrCoNi medium entropy alloy; liquid nitrogen temperature; rolling; annealing; corrosion resistance; passivation film

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