Corrosion Behavior of Fe-Cr Alloys in Ar-10%O2 Atmosphere

Abstract:

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The corrosion of four Fe-Cr alloys (Cr: 9, 12, 20, and 25%) with different Cr contents were subjected to cyclic oxidation furnace in Ar-10%O2 atmosphere at 950oC for 120 h. The samples after oxidation were investigated by using X-ray diffraction (XRD), optical metallography and SEM/EDS. The results indicated that increasing Cr content reduced the oxidation rate and the scale cracking. Alloys with less Cr content occurred breakaway oxidation due to formation of Fe-rich oxide scale. However, a thin protective chromia scale was observed on alloys with Cr > 20%. The corrosion behaviour on Fe-Cr alloy was then discussed based on experimental observation.

Info:

Periodical:

Key Engineering Materials (Volumes 462-463)

Edited by:

Ahmad Kamal Ariffin, Shahrum Abdullah, Aidy Ali, Andanastuti Muchtar, Mariyam Jameelah Ghazali and Zainuddin Sajuri

Pages:

1250-1254

DOI:

10.4028/www.scientific.net/KEM.462-463.1250

Citation:

N. K. Othman et al., "Corrosion Behavior of Fe-Cr Alloys in Ar-10%O2 Atmosphere", Key Engineering Materials, Vols. 462-463, pp. 1250-1254, 2011

Online since:

January 2011

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Price:

$35.00

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