鉄表面に形成する腐食生成物のその場X線回析

概要

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Corrosion reactions on the iron surface are complicated because transfer phenomena of electron and substance occur at the same time. In order to clarify the mechanism of corrosion process or the overall corrosion reactions, in-situ measurement of corrosion products are effective. In this work, in-situ X-ray diffraction measurements were conducted for identifying corrosion products formed on the surface of a pure iron, an iron-0.58mass% phosphorous alloy and an iron-3.2mass% molybdenum alloy by cyclic exposure to wet and dry atmospheres. The results showed that γ-FeOOH, Green Rusts, β-FeOOH, and Fe_3O_4 were formed on the surface of the pure iron, while Green Rusts and β-FeOOH were formed in the iron-0.58mass% phosphor alloy and iron-3.2mass% molybdenum alloy in different manner. On the basis of these results, formation processes of these corrosion products on iron alloys are discussed.報文
東北大学の論文