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US 3,969,135 AGranted
Low temperature aluminum cleaning composition and process
AssigneeOxy Metal Industries Corporation
InventorsPeter F. King, Douglas D. Fekete
Life of this patent
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Abstract
Aluminum surfaces are cleaned at low temperature by the addition of a polyalkylene glycol-abietic acid surfactant and a polyalkylene glycol-hydrocarbon surfactant to an aqueous acidic solution. Preferably, the solution contains fluoride as an accelerator.
Claims8
An aqueous acidic composition suitable for the low temperature cleaning of aluminum surfaces comprising both a first hydrocarbon derivative surfactant having the general formula:
- R(or').sub.n OH
- and a second abietic acid derivative surfactant having the general formula:
- A(r'o).sub.n H
- wherein R is an alkyl or alkylaryl group of 8-22 carbon atoms;
- R' is a divalent radical selected from ethylene, propylene and combinations thereof;
- each n is an integer from 7 to 22;
- and A is the abietic acid radical;
- said surfactants being present in amounts sufficient to remove both readily emulsifiable and difficult-to-emulsify oils.
5 more elements
Dependencies are inferred from the claim text.