Journal
CORROSION SCIENCE
Volume 53, Issue 8, Pages 2446-2452Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2011.03.020
Keywords
Iron; EXFAS; XRD; Oxidation; Oxidation reduction; Rust
Funding
- Japan Society for Promotion of Science
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To clarify the role of phosphate in the formation of corrosion products, the transformation of GRI(CI-) with the addition of phosphate was characterized through XRD, TEM, and solution analysis. Electrochemical analysis showed that the transformation of GRI(CI-) was delayed and the size of the final products, i.e., gamma-FeOOH was reduced in the phosphate added case. X-ray absorption spectroscopy indicated that the neighboring Fe-Fe coordination number of FeO6 octahedral unit in gamma-FeOOH was decreased. These effects of phosphate are attributed to its adsorption on GRI(CI-) and nucleated gamma-FeOOH that prevented particle growth during oxidation process. (C) 2011 Elsevier Ltd. All rights reserved.
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