Patent · US Active

Instrument for cleaning an aluminum workpiece

US8449689B2 · kind B2 · utility

0Cited by

10References

7Claims

0Family size

Assignee

Hydro Aluminium Deutschland GmbH · DE

Inventors

Bernhard Kernig · Cologne, DE
Henk-Jan Brinkman · Bonn, DE

Key dates

Filing date	Sep 14, 2012
Grant date	May 28, 2013
Priority date	—
Expiry date	Sep 14, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23G1/22
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.