Zairyo-to-Kankyo
Online ISSN : 1881-9664
Print ISSN : 0917-0480
Research Paper
Structure and Corrosion Protection of Rust Layer Formed on Pre-rusted Carbon Steel Covered with the Reactive Paint Coating
Masato YamashitaKoushu HanakiToyokazu NomuraToru TerayaNoriyasu UkiKyung-Tae KimShinji FujimotoYasunori HayashiHideki MatsuiAkihiko Kimura
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2017 Volume 66 Issue 3 Pages 93-98

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Abstract

Effect of Al ion on the structure and corrosion protection of rust layer on a carbon steel has been examined. It was found that coexistence of Al ion in atmospheric corrosion environment leads to preferential formation of α-FeOOH structure in the rust layer. Addition of Al ion into heavy-duty coating brings the structural change effect to the rust layer; that is, residual rust consisting mainly of β-FeOOH and Fe3O4 on salinity-pre-corroded carbon steel can change its structure to α-FeOOH considerably after applying the heavy-duty reactive paint coating. This change in the structure of rust layer results in higher corrosion protection properties of the reactive paint.

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© 2017 Japan Society of Corrosion Engineering
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