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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 06.12.2017, 00:00 by Alan Mcleod, Richard Clegg
High 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

64

Issue

5

Start Page

381

End Page

387

Number of Pages

7

eISSN

1521-4176

ISSN

0947-5117

Location

Weinheim, Germany

Publisher

Wiley-VCH Verlag GmbH & Co

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Institute for Resource Industries and Sustainability (IRIS); Process Engineering and Light Metals;

Era Eligible

Yes

Journal

Materials and corrosion.