SURFACE TREATMENT COMPOSITION FOR ALUMINUM AND ALUMINUM ALLOY

A composition for aluminum surface treatment is provided to suppress the generation of wastewater containing a large amount of nitrogen oxides and improve corrosion resistance and adhesion of a film formed on the surface by completely removing alien substances such as silicon and iron on a surface o...

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Bibliographische Detailangaben
Hauptverfasser:	JUNG, SE GEUN, YANG, TAE RIM
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	A composition for aluminum surface treatment is provided to suppress the generation of wastewater containing a large amount of nitrogen oxides and improve corrosion resistance and adhesion of a film formed on the surface by completely removing alien substances such as silicon and iron on a surface of aluminum or aluminum alloy without using nitrogen or a mixed solution of nitric acid and hydrofluoric acid. A composition for aluminum surface treatment comprises: 50 to 200 g/L of an acid selected from sulfuric acid, phosphoric acid, and formic acid; 10 to 50 g/L of at least one oxidizer selected from potassium persulfate and ammonium persulfate; and 0.5 to 100 g/L of a fluorine compound selected from silicon fluoride and ammonium hydrogenfluoride such that the composition removes an alkali solvent and iron remained on a degreased aluminum surface.