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Effect of exposure time on the morphology of corrosion on high chromium white cast iron in high temperature caustic solutions
journal contribution
posted on 2017-12-06, 00:00 authored by Alan McleodAlan Mcleod, Richard CleggRichard CleggHigh chromium white irons are important candidate materials for use in alumina refineries to combat wear and corrosion.The effect of exposure time on the formation of oxide films was studied in a 23% Cr white cast iron exposed at 260 8C in 110 g/l caustic soda solutions. It was found that whilst well-formed octahedral M(II)O.M(III)2O3 spinel type oxides initially formed and spread across the surface of the material, these were gradually replaced by a background oxide with a higher Cr/Fe ratio and the morphology of the octahedral crystals became less well formed. Also, the oxidation was found to be predominantly in the matrix material, leaving carbide particles unsupported on the surface and in the later stages, significant corrosion was found along the carbide/matrix phase boundary.
Funding
Category 4 - CRC Research Income
History
Volume
64Issue
5Start Page
381End Page
387Number of Pages
7eISSN
1521-4176ISSN
0947-5117Location
Weinheim, GermanyPublisher
Wiley-VCH Verlag GmbH & CoPublisher DOI
Full Text URL
Language
en-ausPeer Reviewed
- Yes
Open Access
- No
External Author Affiliations
Institute for Resource Industries and Sustainability (IRIS); Process Engineering and Light Metals;Era Eligible
- Yes