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Title: Investigation of high temperature corrosion behavior on 304L austenite stainless steel in corrosive environments

Abstract

In this work, 304L stainless steel samples were exposed at 700 °C for 10hrs in different corrosive environments; dry oxygen, molten salt, and molten salt + dry oxygen. The corrosion behavior of samples was analyzed using weight change measurement technique, optical microscope (OM) and Scanning Electron Microscope (SEM) equipped with Energy Dispersive X-ray (EDX). The existence phases of corroded sample were determined using X-ray Diffraction (XRD). The lowest corrosion rate was recorded in dry oxygen while the highest was in molten salt + dry oxygen environments with the value of 0.0062 mg/cm{sup 2} and −13.5225 mg/cm{sup 2} respectively. The surface morphology of sample in presence of salt mixture showed scale spallation. Oxide scales of Fe{sub 3}O{sub 4}, Fe{sub 2}O{sub 3} were the main phases developed and detected by XRD technique. Cr{sub 2}O{sub 3} was not developed in every sample as protective layers but chromate-rich oxide was developed. The cross-section analysis found the oxide scales were in porous, thick and non-adherent that would not an effective barrier to prevent from further degradation of alloy. EDX analysis also showed the Cr-element was low compared to Fe-element at the oxide scale region.

Authors:
; ; ;  [1]
  1. School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM Bangi Selangor (Malaysia)
Publication Date:
OSTI Identifier:
22308313
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1614; Journal Issue: 1; Conference: 2014 UKM FST postgraduate colloquium, Selangor (Malaysia), 9-11 Apr 2014; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AUSTENITE; CHROMATES; CHROMIUM OXIDES; CORROSION; FERRITES; IRON OXIDES; MOLTEN SALTS; OPTICAL MICROSCOPES; POROUS MATERIALS; SCANNING ELECTRON MICROSCOPY; STAINLESS STEEL-304L; X-RAY DIFFRACTION

Citation Formats

Sahri, M. I., Othman, N. K., Samsu, Z., and Daud, A. R.. Investigation of high temperature corrosion behavior on 304L austenite stainless steel in corrosive environments. United States: N. p., 2014. Web. doi:10.1063/1.4895188.
Sahri, M. I., Othman, N. K., Samsu, Z., & Daud, A. R.. Investigation of high temperature corrosion behavior on 304L austenite stainless steel in corrosive environments. United States. doi:10.1063/1.4895188.
Sahri, M. I., Othman, N. K., Samsu, Z., and Daud, A. R.. Wed . "Investigation of high temperature corrosion behavior on 304L austenite stainless steel in corrosive environments". United States. doi:10.1063/1.4895188.
@article{osti_22308313,
title = {Investigation of high temperature corrosion behavior on 304L austenite stainless steel in corrosive environments},
author = {Sahri, M. I. and Othman, N. K. and Samsu, Z. and Daud, A. R.},
abstractNote = {In this work, 304L stainless steel samples were exposed at 700 °C for 10hrs in different corrosive environments; dry oxygen, molten salt, and molten salt + dry oxygen. The corrosion behavior of samples was analyzed using weight change measurement technique, optical microscope (OM) and Scanning Electron Microscope (SEM) equipped with Energy Dispersive X-ray (EDX). The existence phases of corroded sample were determined using X-ray Diffraction (XRD). The lowest corrosion rate was recorded in dry oxygen while the highest was in molten salt + dry oxygen environments with the value of 0.0062 mg/cm{sup 2} and −13.5225 mg/cm{sup 2} respectively. The surface morphology of sample in presence of salt mixture showed scale spallation. Oxide scales of Fe{sub 3}O{sub 4}, Fe{sub 2}O{sub 3} were the main phases developed and detected by XRD technique. Cr{sub 2}O{sub 3} was not developed in every sample as protective layers but chromate-rich oxide was developed. The cross-section analysis found the oxide scales were in porous, thick and non-adherent that would not an effective barrier to prevent from further degradation of alloy. EDX analysis also showed the Cr-element was low compared to Fe-element at the oxide scale region.},
doi = {10.1063/1.4895188},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1614,
place = {United States},
year = {Wed Sep 03 00:00:00 EDT 2014},
month = {Wed Sep 03 00:00:00 EDT 2014}
}