The atmospheric corrosion of iron as studied by Mössbauer spectroscopy |
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Authors: | Henry Leidheiser Jr Svetozar Musi |
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Affiliation: | Center for Surface and Coatings Research, Lehigh University, Bethlehem, PA-18015, U.S.A. |
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Abstract: | The composition of the rust on the surface of steel panels was determined after atmospheric exposure times of 2 weeks, 2 months and 6 months. The initial product is γ-FeOOH which converts in time to a mixture of α-FeOOH and γ-Fe2O3. Steel exposed for times of the order of 25 years is covered with corrosion product consisting largely of γ-Fe2O3. The similarity between the composition of the corrosion products and precipitates formed from FeSO4 solution under mildly acidic conditions at 90°C suggests that the dominant anion in these atmospheric corrosion experiments is sulfate. |
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