王鑫潮,王 岩,侯利锋,张少华,刘宝胜,卫英慧.长期时效N10276合金在CO2/H2S/Cl- 环境中的腐蚀行为[J].稀有金属材料与工程,2022,51(8):2754~2760.[wangxinchao,wangyan,houlifeng,zhangshaohua,liubaosheng,weiyinghui.Corrosion Behavior of Long-Term Aged N10276 Alloy in CO2/H2S/Cl- Environments[J].Rare Metal Materials and Engineering,2022,51(8):2754~2760.]
长期时效N10276合金在CO2/H2S/Cl- 环境中的腐蚀行为
投稿时间:2022-01-13  修订日期:2022-01-28
中文关键词:  腐蚀机理  N10276合金  长期时效  H2S
基金项目:
中文摘要:
      通过电化学阻抗与循环动电位极化的方法研究了在CO2/Cl-以及CO2/H2S/Cl-溶液体系中、长期时效前后N10276合金的腐蚀机理。结果表明,阻抗弧的低频区间出现了一个不完整的容抗弧,并且随H2S浓度的增加(10~100 μL/L)转变为Warburg阻抗,其主要原因是高含量H2S相关吸附物。H2S可以增加合金腐蚀速率。相比较而言,长期时效处理主要作用于合金点蚀的形成,其中,经过长期时效处理的奥氏体组织内存在大量的第二相(富含Mo与Ni的μ相),而析出物周围的区域成为优先腐蚀区域,进而导致了N10276合金点蚀的发生。
Corrosion Behavior of Long-Term Aged N10276 Alloy in CO2/H2S/Cl- Environments
英文关键词:corrosion mechanism  N10276 alloy  long-term aging  H2S
英文摘要:
      The corrosion mechanism of the N10276 alloy before and after long-term aging treatment in aqueous solutions containing CO2/Cl- and CO2/H2S/Cl- was studied through the electrochemical impedance plots and cyclic potentiodynamic polarization. Results reveal that a not-well-defined capacitive loop appears in the low-frequency range and it changes into Warburg's impedance as the H2S concentration increases (10~100 μL/L) due to the large quantities of H2S-related adsorbed species in the film. In addition, H2S concentration plays a key role in increasing corrosion rate. In comparison, the action of long-term aging is more significant on pitting corrosion. The surrounding sites of the precipitates become the preferred corrosion area since the austenite microstructure of long-term aged N10276 alloy includes lots of precipitated second phases (μ phase with accumulation of Mo and Ni elements), leading to the occurrence of pitting defects.
作者单位E-mail
王鑫潮 太原理工大学材料科学与工程学院 wangxinchao0017@link.tyut.edu.cn 
王 岩 太原钢铁(集团)有限公司 先进不锈钢材料国家重点实验室  
侯利锋 太原理工大学材料科学与工程学院  
张少华 太原科技大学 材料科学与工程学院  
刘宝胜 太原科技大学 材料科学与工程学院  
卫英慧 太原理工大学材料科学与工程学院 yhwei_tyut@126.com 
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