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research-article

Characterization of Alloy 214 after Exposure to Superheated Steam at 800?C

[+] Author and Article Information
Nick Tepylo

Department of Mechanical and Aerospace Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
NickTepylo@cmail.carleton.ca

Rainier Garcia Sanchez

Department of Mechanical and Aerospace Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
rainiergarciasanchez@cmail.carleton.ca

Xiao Huang

Department of Mechanical and Aerospace Engineering, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
xiao.huang@carleton.ca

1Corresponding author.

ASME doi:10.1115/1.4037718 History: Received March 27, 2017; Revised July 26, 2017

Abstract

In this study, an Al-containing Alloy 214 was evaluated in superheated steam at 800°C for a duration of 600 hours. The purpose of using superheated steam was to simulate the SCW condition at higher temperatures where no commercial SCW rig is currently capable of reaching (800°C and beyond). After exposure to superheated steam, the weight change and surface oxidation were analyzed. Alloy 214 experienced greater weight gain than IN 625 and Ni20Cr5Al, due to its low Cr content. Formation of both Cr2O3 and Al2O3 were observed on the surface after 300 and 600 hours of exposure. However, as exposure progressed, more Ni and Mn containing spinel started to form, signalling Cr and Al depletion on the metal substrate surface.

Copyright (c) 2017 by ASME
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