Microalloy Precipitation at the Glass–Steel Interface Enabling Adherence of Porcelain Enamel |
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| Authors: | Simon Striepe Hansjörg Bornhöft Joachim Deubener Jörg Wendel |
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| Affiliation: | 1. Institute of Non‐Metallic Materials, Clausthal University of Technology, Clausthal‐Zellerfeld, Germany;2. Wendel Email GmbH, Dillenburg, Germany |
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| Abstract: | The adherence of vitreous enamels on steel plates is studied clarifying the mechanisms taking place at the interface during firing. Evidence is provided from electron microprobe analysis for an iron alloy precipitation at the interface, which results from oversaturation of ferrous iron in the enamel glass. Subsequent coalescence of the alloy particles is observed but only after their bonding to the base metal adherence after cupping is achieved. The formation of microalloys requires Co2+, Ni2+, and Cu2+ ions in the enamel glass. A selective dissolution of the base metal by the latter cations does not occur. |
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