| Corrosion mechanism of K411 superalloy in sulfur-containing environment: sulfidation promoting internal nitridation | |
| Yu, Ren2; Wang, Yao1; Wang, Lei2; Jiang, Xiangwei1; Dong, Jiasheng1 | |
| 通讯作者 | Wang, Yao(yaowang@imr.ac.cn) ; Wang, Lei(wanglei@mail.neu.edu.cn) |
| 2024-07-18 | |
| 发表期刊 | CORROSION REVIEWS
 |
| ISSN | 0334-6005 |
| 页码 | 13 |
| 摘要 | Corrosion exposure study was conducted on the commercial nickel-based K411 superalloy in a simulated gas turbine operating environment (air + 2 vol% SO2) at 900 degrees C up to 2000 h. The corrosion behavior of the alloy was quantificationally analyzed from both morphological and chemical points with SEM, XRD, EDS, and EPMA. The results show that the formation of fine TiN inside the oxide layer can be strongly accelerated with the introduction of SO2. Sulfide is assumed as diffusion channels for gas molecules that accelerate internal nitridation. Large-volume variation caused by the TiN formation leads to a stress gradient, which induces Cr and Ni elements from inside to the surface of the alloy. The oxide scales release the compressive stresses generated by internal nitridation through forming protrusions on the surface, which is a potential risk for alloy failure. The corrosion behavior of K411 superalloy is controlled by a combination of oxidation, sulfidation, and internal nitridation whereby the relevant corrosion mechanism has been given. |
| 关键词 | nickel-based superalloy SO2 atmosphere corrosion sulfidation internal nitridation |
| 资助者 | Northeastern University ; Institute of Metal Research, Chinese Academy of Sciences |
| DOI | 10.1515/corrrev-2024-0005 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Northeastern University ; Institute of Metal Research, Chinese Academy of Sciences |
| WOS研究方向 | Electrochemistry ; Metallurgy & Metallurgical Engineering ; Materials Science |
| WOS类目 | Electrochemistry ; Metallurgy & Metallurgical Engineering ; Materials Science, Coatings & Films |
| WOS记录号 | WOS:001271781800001 |
| 出版者 | WALTER DE GRUYTER GMBH |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/188197 |
| 专题 | 中国科学院金属研究所 |
| 通讯作者 | Wang, Yao; Wang, Lei |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Northeastern Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Ren,Wang, Yao,Wang, Lei,et al. Corrosion mechanism of K411 superalloy in sulfur-containing environment: sulfidation promoting internal nitridation[J]. CORROSION REVIEWS,2024:13. |
| APA | Yu, Ren,Wang, Yao,Wang, Lei,Jiang, Xiangwei,&Dong, Jiasheng.(2024).Corrosion mechanism of K411 superalloy in sulfur-containing environment: sulfidation promoting internal nitridation.CORROSION REVIEWS,13. |
| MLA | Yu, Ren,et al."Corrosion mechanism of K411 superalloy in sulfur-containing environment: sulfidation promoting internal nitridation".CORROSION REVIEWS (2024):13. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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