| 摘要 |
<p>The invention relates to a method of conditioning the surface of a work piece, in particular of a litho-strip or litho-sheet, consisting of an aluminium alloy. The object of the invention to provide a method for conditioning the surface of a work piece and a work piece consisting of an aluminium alloy enabling an increasing 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, is solved in that the method of conditioning comprises at least the step of degreasing the surface of the work piece with a degreasing medium, wherein the aqueous 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, preferably 30 - 70 % soda, wherein sodium hydroxide is added to the aqueous degreasing medium such that the concentration of sodium hydroxide in the aqueous degreasing medium is 0,01 to 5 % by weight, preferably 0,1 to 1,5 % by weight, more preferably 1 to 2,5 % per weight.</p> |
