Ti60合金在600°C湿氧流中固体NaCl沉积物下的腐蚀行为

Corrosion Behavior of Ti60 Alloy under a Solid NaCl Deposit in Wet Oxygen Flow at 600 °C.

作者信息

Fan Lei, Liu Li, Yu Zhongfen, Cao Min, Li Ying, Wang Fuhui

机构信息

Institute of Metal Research, Chinese Academy of Sciences, Wencui Road 62, Shenyang 110016, Liaoning, China.

Key Laboratory for Anisotropy and Texture of Materials (MoE), School of Materials Science and Engineering, Northeastern University, NO. 3-11, Wenhua Road, Heping District, Shenyang 110819, Liaoning, China.

出版信息

Sci Rep. 2016 Jun 30;6:29019. doi: 10.1038/srep29019.

DOI:10.1038/srep29019

PMID:27357732

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4928051/

Abstract

The corrosion behavior of Ti60 alloy covered with a solid NaCl deposit in wet oxygen flow at 600 °C has been studied further by SEM, EDX, XPS, XRD, TEM and EPMA analysis. The results show that solid NaCl and H2O react with Ti oxides, which destroyed the Ti oxide scale to yield the non-protective Na4Ti5O12 and other volatile species. The resulting corrosion product scale was multilayered and contained abundant rapid diffusion channels leading to the fast diffusion which improved the corrosion rate. A possible mechanism has been proposed for the NaCl-covered Ti60 alloy, based on the experimental results.

摘要

通过扫描电子显微镜（SEM）、能谱仪（EDX）、X射线光电子能谱仪（XPS）、X射线衍射仪（XRD）、透射电子显微镜（TEM）和电子探针微分析仪（EPMA）分析，对600 °C下湿氧流中覆盖有固态氯化钠沉积物的Ti60合金的腐蚀行为进行了进一步研究。结果表明，固态氯化钠和水与钛氧化物发生反应，破坏了钛氧化膜，生成了非保护性的Na4Ti5O12和其他挥发性物质。生成的腐蚀产物膜是多层的，包含大量快速扩散通道，导致快速扩散，从而提高了腐蚀速率。基于实验结果，提出了一种覆盖氯化钠的Ti60合金的可能腐蚀机制。