文献类型：期刊文献

英文题名：Insight into a high temperature selective oxidation of HP40 alloy under a H2-H2O environment

作者：Bao, Binbin[1];Liu, Jinglei[1];Xu, Hong[1];Liu, Bo[1];Zhang, Kai[1];Jin, Zhaorong[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：7

期号：14

起止页码：8589

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20170503317728);WOS:【SCI-EXPANDED(收录号:WOS:000393758700060)】；

基金：This work is gratefully supported by Research Fund for the Doctoral Program of Higher Education of China (20110074110009) and Sinopec Corp., China.

语种：英文

外文关键词：Manganese - Oxidation - Chromium

摘要：In the present work, a selective oxidation process of HP40 alloy at 1050 degrees C under a H-2-H2O environment were studied in detail by means of SEM, EDS, GD-OES, XRD, Raman spectra and XPS. The results revealed that selective oxidation of Mn and Cr elements was realized, and the oxide scale preferentially grew via grain boundary rather than via grain lattice. The oxide scales were composed of a majority of MnCr2O4 spinel and a spot of Cr2O3 throughout the oxidation process. Mn existed in the form of Mn2+ ions on the surface, while Cr existed in various species. Metal hydroxides appeared on the surface approved by spectra of the O 1s region, and the relative amount of them decreased with oxidation time.