Journal
SURFACE & COATINGS TECHNOLOGY
Volume 200, Issue 22-23, Pages 6594-6600Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2005.11.039
Keywords
surfaces and interfaces; coating materials; metals and alloys; scanning electron microscopy; X-ray diffiraction
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The structure and the corrosion performance of Zn coatings formed by pack cementation and fluidized bed reactor at 250, 350, 380 and 400 degrees C have been studied. From this investigation, it turned out that these coatings are composed of two layers referring to gamma-FeIIZn40 and delta-FeZn10 phases of the Fe-Zn phase diagram. Furthermore, in the pack coatings, inclusions were detected, which are composed of Fe and Zn at almost equal concentrations. Concerning the corrosion, a mechanism of stress corrosion has been identified. The corrosion performance of the studied coatings is similar to that of the hot-dip galvanized coatings, although the deposition method is different. (c) 2005 Elsevier B.V. All rights reserved.
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