Aluminum desmut composition and process
AssigneeAtotech USA, Inc.
InventorsMaynard W. McNeil, Edward J. Reimbold, King C. Waldron
Life of this patent
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Abstract
A composition of matter is disclosed for cleaning an aluminum surface comprising: a hydroxy organic acid; an organic complexing agent; a phosphorous oxide acid; a nitrogen oxide acid; optionally a urea compound; and optionally a compound having a fluoride ion.
Claims36
A composition of matter for cleaning an aluminum surface comprising:
- from about 70 to about 140 g/l of a hydroxy organic acid;
- from about 20 to about 35 g/l of an aminocarboxylic acid complexing agent;
- an aqueous phosphorous oxide acid at about 85% concentration in an amount from about 50 to about 60% by volume;
- an aqueous nitrogen oxide acid at about 60 to about 65% concentration in an amount from about 5 to about 15% by volume;
- from 0 to about 20 g/l of a urea compound;
- and
- from 0 to about 4 g/l of a compound having a fluoride ion.
A process for cleaning an aluminum surface comprising applying to said surface a composition of matter comprising:
- from about 70 to about 140 g/l of a hydroxy organic acid;
- from about 20 to about 35 g/l of an aminocarboxylic acid complexing agent;
- an aqueous phosphorous oxide acid at about 85% concentration in an amount from about 50 to about 60% by volume;
- an aqueous nitrogen oxide acid at about 60 to about 65% concentration in an amount from about 5 to about 15% by volume;
- from 0 to about 20 g/l of a urea compound;
- and
- from 0 to about 4 g/l of a compound having a fluoride ion.
A product for cleaning an aluminum surface produced by the process comprising mixing:
- from about 70 to about 140 g/l of a hydroxy organic acid;
- from about 20 to about 35 g/l of an aminocarboxylic acid complexing agent;
- an aqueous phosphorous oxide acid at about 85% concentration in an amount from about 50 to about 60% by volume;
- an aqueous nitrogen oxide acid at about 60 to about 65% concentration in an amount from about 5 to about 15% by volume;
- from 0 to about 20 g/l of a urea compound;
- and
- from 0 to about 4 g/l of a compound having a fluoride ion.
A desmut composition of matter for an aluminum-silicon alloy wherein said composition is a mixture of compounds comprising:
- from about 70 to about 140 g/l of a hydroxy organic acid;
- from about 20 to about 35 g/l of an aminocarboxylic acid complexing agent;
- an aqueous phosphorous oxide acid at about 85% concentration in an amount from about 50 to about 60% by volume;
- an aqueous nitrogen oxide acid at about 60 to about 65% concentration in an amount from about 5 to about 15% by volume;
- from 0 to about 20 g/l of a urea compound;
- and
- from 0 to about 4 g/l of a compound having a fluoride ion;
- where said compounds are present in an amount sufficient to remove smut from the surface of said aluminum-silicon alloy.
A process for removing smut from an aluminum-silicon alloy surface comprising applying to said surface a composition of matter wherein said composition is a mixture of compounds comprising:
- from about 70 to about 140 g/l of a hydroxy organic acid;
- from about 20 to about 35 g/l of an aminocarboxylic acid complexing agent;
- an aqueous phosphorous oxide acid at about 85% concentration in an amount from about 50 to about 60% by volume;
- an aqueous nitrogen oxide acid at about 60 to about 65% concentration in an amount from about 5 to about 15% by volume;
- from 0 to about 20 g/l of a urea compound;
- and
- from 0 to about 4 g/l of a compound having a fluoride ion;
- where said compounds are present in an amount sufficient to remove smut from the surface of said aluminum-silicon alloy.
A product for removing smut from an aluminum-silicon alloy surface produced by the process comprising mixing the compounds:
- from about 70 to about 140 g/l of a hydroxy organic acid;
- from about 20 to about 35 g/l of an aminocarboxylic acid complexing agent;
- an aqueous phosphorous oxide acid at about 85% concentration in an amount from about 50 to about 60% by volume;
- an aqueous nitrogen oxide acid at about 60 to about 65% concentration in an amount from about 5 to about 15% by volume;
- from 0 to about 20 g/l of a urea compound;
- and
- from 0 to about 4 g/l of a compound having a fluoride ion;
- where said compounds are present in an amount sufficient to remove smut from the surface of said aluminum-silicon alloy.
Dependencies are inferred from the claim text.