Journal
CORROSION SCIENCE
Volume 45, Issue 5, Pages 1037-1049Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0010-938X(02)00150-6
Keywords
steel; EXAFS; Mossbauer spectroscopy; amorphous structure; rust
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The poorly crystallized steel rusts have been prepared by hydrolysis of aqueous solutions dissolving Fe(III) and different metal ions such as Ti(IV), Cr(III), Ni(II) and Cu(II) at varied atomic ratios in metal/(Fe + metal). The precipitates formed by the hydrolysis were frozen with liquid N-2 to inhibit crystallization and particle growth. The rusts produced were poorly crystalline and nanosized particles with sizes of 4-10 nm and the rust formed without adding metal ions was assigned to ferrihydrite. The crystallite size decreased from 1.1 to 0.7 nm with increasing the added metal ions. It was shown by extended X-ray fine structure and Mossbauer spectroscopy that the short-range structure of poorly crystalline rusts was disturbed by adding Ti(IV). (C) 2002 Elsevier Science Ltd. All rights reserved.
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