Influences of Co2+, Cu2+ and Cr3+ ions on the formation of magnetite

Authors
Ishikawa, T Nakazaki, H Yasukawa, A Kandori, K Seto, M
Citation
T. Ishikawa et al., Influences of Co2+, Cu2+ and Cr3+ ions on the formation of magnetite, CORROS SCI, 41(8), 1999, pp. 1665-1680
Citations number
21
Categorie Soggetti
Material Science & Engineering
Journal title
CORROSION SCIENCE
ISSN journal
0010938X → ACNP
Volume
41
Issue
8
Year of publication
1999
Pages
1665 - 1680
Database
ISI
SICI code
0010-938X(199908)41:8<1665:IOCCAC>2.0.ZU;2-2
Abstract
The oxidation products of Fe(OH)(2) formed in the presence of Co2+, Cu2+ an d Cr3+ were characterized by various means. Co2+ and Cu2+ produced pure Fe3 O4 by inhibiting the generation of alpha-FeOOH, whilst Cr3+ promoted the al pha-FeOOH formation and interfered with the Fe3O4 formation. The Fe3O4 part icles produced with Co2+ exhibited high Fe2+ content, electrical conductivi ty and stability to oxidation. Mossbauer spectroscopy demonstrated that the excess Fe2+ replaced for Fe3+ in B-sites of Fe3O4. A small quantity of met al Fe formed in addition to Fe3O4 on adding Co2+. (C) 1999 Elsevier Science Ltd. All rights reserved.