工程科学学报2016，Vol.38Issue(5)：706-713,8.DOI:10.13374/j.issn2095-9389.2016.05.016
镍基合金C276在超临界水中的腐蚀行为
Corrosion behavior of Ni-base alloy C276 in supercritical water
沈朝 1汪家梅 1张乐福1
作者信息
- 1. 上海交通大学核科学与工程学院，上海200240
- 折叠
摘要
Abstract
This article is focused on the corrosion behavior of Ni-base alloy C276 exposed to 550-650℃/25 MPa supercritical water. The oxidation kinetics, oxide morphology, element distribution and structure of the oxide film were analyzed by using weight gain measurement, scanning electron microscopy, energy spectrometry, and X-ray diffraction analysis. It is shown that C276 alloy exhibits general corrosion in the supercritical water, and the weight gain is subject to parabolic growth kinetics. The weight gain of C276 alloy at 600℃ is approximately three times that of C276 alloy at 550℃, while the weight gain shows a decline when the temper-ature increases to 650℃. The oxide film is not distinguishable and is mainly consisted of (Ni,Fe)Cr2O4. A large number of NiO oxide particles are observed on the oxide film. The protective ability of the oxide film is dependent upon Cr content, and the higher the Cr content, the better the protective ability is.关键词
镍合金/超临界水/腐蚀/氧化膜Key words
nickel alloys/supercritical water/corrosion/oxide films分类
矿业与冶金引用本文复制引用
沈朝,汪家梅,张乐福..镍基合金C276在超临界水中的腐蚀行为[J].工程科学学报,2016,38(5):706-713,8.
