Metallic articles having vitreous or glass-ceramic pigmented protective layers having a high chemical resistance
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United States of America Patent
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Jan 3, 2017
Grant Date -
Dec 1, 2011
app pub date -
Dec 23, 2009
filing date -
Dec 24, 2008
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Abstract
Metallic substrates with a vitreous or glass-ceramic pigmented protective layer are obtainable by applying an alkali metal silicate-containing coating sol to the substrate or a surface thereof and thermally densifying the layer thus obtained, said alkali metal silicate-containing coating sol comprising an oxidic pigment of at least one element selected from the third and fourth main or subgroups of the Periodic Table of the chemical elements and the transition metals Fe, Co, Ni, Cu, Zn, Nb and Ta.
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