Fluoride-free flux compositions for hot galvanization in...

Details Fluoride-free flux compositions for hot galvanization in... Fluoride-free flux compositions for hot galvanization in...

B - Operations, Transporting

23

K

148/62.1

B23K 35/362 (2006.01) C23C 2/30 (2006.01)

Patent

CA 1312535

ABSTRACT Flux compositions characterized in that they contain the following, by weight: 80 to 90% of ZnC12, 10 to 20% of NH4Cl, and, based on the weight of ZnCl2 + NH4Cl: 0.01 to 5% of a wetting agent, 0 to 5% of a foaming agent, and 0 to 5% of a soluble rare earth salt. The foaming agent is present in the form of a polyalcohol such as glycerol, sorbitol, mannitol, pentaerythritol and others, or a polyglycol, or in the form of a molecule such as hexamethylenetetramine or decylamine, or in the form of any combination of foaming agents. These flux compositions may be applied as a galvanizing flux in a dry process, where the galvanization alloy bath contains more than 0.15% of aluminum.

531097

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