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US 7,232,479 B2Granted
Coating composition for a metal substrate
AssigneeDacral
InventorsJean-Marie Poulet, Alain Chesneau, Georges Leger, Denis Begue
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Abstract
The invention relates to a coating composition for a metal substrate exhibiting a free outer surface consisting of a metal coating based on zinc or a zinc-based alloy, characterized in that it comprises: silicate(s) of sodium and/or potassium and/or lithium (3-35 wt. %), a tensioning agent (à.01-1 wt. %), the remainder being water in a quantity sufficient to arrive at 100 %.
Claims42
Coating composition for a metal substrate having a free outer surface, formed by a layer of zinc or of a zinc-based alloy, wherein the coating composition comprises (in % by weight):
- sodium and/or potassium and/or lithium silicate(s) incorporated in the form of an aqueous solution:
- 3%-35%
- surfactant:
- 0.01%-1%
- a silane, in an amount of up to 50% by weight of dry coating,
- water:
- qs 100%
- and wherein said composition has a surface tension value of between 20 mN/m and 50 mN/n.
5 more elements
Dependencies are inferred from the claim text.