Oxidation of NiCr and NiCrMo alloys at low temperatures

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Pub Date : 2023-09-22 DOI:10.5006/4400

Cameron Volders, Gopalakrishnan Ramalingam, Valentina Angelici Avincola, Iradwikanari Waluyo, Adrian Hunt, Petra Reinke

引用次数: 0

Abstract

Oxidation of Ni-Cr and Ni-Cr-Mo was studied in operando with near ambient pressure x-ray photoelectron spectroscopy in the Cabrera-Mott regime. The oxidation temperature was 200 °C - a severely diffusion limited regime. The near-surface alloy is Cr-enriched after reduction of natives oxide in vacuum, and especially so for Ni-15Cr-6Mo. Mo-cations are integrated in the oxide and Mo(VI) dominates at the surface. The surface chemistry driven promotion of chromia by Mo predicted by theory is negated by the limited surface diffusion of reactants. Pre-oxidation processing is proposed to control the oxide properties for use of Ni-Cr superalloys at low temperatures.

查看原文本刊更多论文

NiCr和NiCrMo合金的低温氧化

在Cabrera-Mott体制下，用近环境压力x射线光电子能谱研究了Ni-Cr和Ni-Cr- mo的氧化反应。氧化温度为200℃，是一个严重的扩散限制区。真空还原后的近表面合金富cr，特别是Ni-15Cr-6Mo合金富cr。Mo-阳离子被整合在氧化物中，Mo(VI)在表面占主导地位。理论预测的表面化学作用下Mo对铬含量的促进作用由于反应物表面扩散的限制而被否定。提出了采用预氧化工艺控制镍铬高温合金低温氧化性能的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Corrosion MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

2.80

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： CORROSION is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control. The scope of the journal includes the latest developments in areas of corrosion metallurgy, mechanisms, predictors, cracking (sulfide stress, stress corrosion, hydrogen-induced), passivation, and CO2 corrosion. 70+ years and over 7,100 peer-reviewed articles with advances in corrosion science and engineering have been published in CORROSION. The journal publishes seven article types – original articles, invited critical reviews, technical notes, corrosion communications fast-tracked for rapid publication, special research topic issues, research letters of yearly annual conference student poster sessions, and scientific investigations of field corrosion processes. CORROSION, the Journal of Science and Engineering, serves as an important communication platform for academics, researchers, technical libraries, and universities. Articles considered for CORROSION should have significant permanent value and should accomplish at least one of the following objectives: • Contribute awareness of corrosion phenomena, • Advance understanding of fundamental process, and/or • Further the knowledge of techniques and practices used to reduce corrosion.