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US 8,449,689 B2Granted
Instrument for cleaning an aluminum workpiece
AssigneeHydro Aluminium Deutschland GmbH
InventorsBernhard Kernig, Henk-Jan Brinkman
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AssigneeHydro Aluminium Deutschland GmbH
InventorsBernhard Kernig, Henk-Jan Brinkman
Estimating the term…
A method of conditioning the surface of a work piece, in particular of a litho-strip or litho-sheet, consisting of an aluminum alloy enables an increase in manufacturing speed in surface roughening while maintaining a high quality of the electro-chemical grained surface of the work piece with relative low effort related to facility equipment. The method of conditioning comprises at least the step of degreasing the surface of the work piece with a degreasing medium, wherein the degreasing medium contains at least 1.5 to 3% by weight of a composite of 5-40% sodium tripolyphosphate, 3-10% sodium gluconate, 3-8% of a composite of non-ionic and anionic surfactants and optionally 0.5 to 70% soda, wherein sodium hydroxide is added to the degreasing medium such that the concentration of sodium hydroxide in the aqueous degreasing medium is 0.01 to 5% by weight.
Method of conditioning a surface of a strip consisting of an aluminum alloy, the method comprising at least the step of degreasing the surface of the strip with an aqueous degreasing medium, wherein the aqueous degreasing medium comprises at least 1.5 to 3% by weight of a composite of 5-40% sodium tripolyphosphate, 3-10% sodium gluconate, 3-8% of a composite of non-ionic and anionic surfactants and optionally 0.5-70% soda, wherein the aqueous degreasing medium comprises sodium hydroxide such that a concentration of sodium hydroxide in the aqueous degreasing medium is 0.01 to 5% by weight;
Dependencies are inferred from the claim text.