The Proceedings of the National Symposium on Power and Energy Systems
Online ISSN : 2424-2950
2008.13
Session ID : A106
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A106 Effects of steel compositions and environmental factors on FAC rate of carbon steels
Yutaka WATANABEKiyoshi TANINO
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CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract
Effects of Cr content and environmental factors, pH and dissolved oxygen concentration, on removal rate of carbon steels due to flow accelerated corrosion have been examined by experiments. pH dependency of the FAC rate has been found to be directly related to solubility of magnetite. Cr content holds a strong impact on the FAC rate regardless of pH values from 6.84 to 10.4. Addition of 1% Cr to a carbon steel reduces the FAC rate by one order of magnitude under the environmental conditions, where magnetite forms. Addition of oxygen up to 1200ppb changes the oxide from magnetite to hematite, resulting in significant improvement in corrosion resistance.
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© 2008 The Japan Society of Mechanical Engineers
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