METHOD FOR TREATING ALUMINUM CONTAINING SURFACES

A primary film of Ni, Fe, and/or Co is formed on an aluminum surface and a phosphate film is formed on the aluminum surface on which this primary film has been formed, or on a composite of an aluminum ssurface on which a primary film has been formed and a zinc based coated steel sheet. This method o...

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Bibliographische Detailangaben
Hauptverfasser: TANI, DAIJIRO, TANAKA, SHIGEO, MATSUSHIMA, YASUNOBU
Format: Patent
Sprache:eng ; fre
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Zusammenfassung:A primary film of Ni, Fe, and/or Co is formed on an aluminum surface and a phosphate film is formed on the aluminum surface on which this primary film has been formed, or on a composite of an aluminum ssurface on which a primary film has been formed and a zinc based coated steel sheet. This method of surface treatment is not accompanied with pollution problems with Cr6+ ion and F-, and there is little deterioration of the phosphate film forming treatment liquid with use.