Phosphate treatment of zinc-aluminium plated materials

The plated material is treated beforehand with an alkaline aqueous solution with a pH of 11 or more which contains ions of one or more of the metals selected from the group consisting of nickel, iron, cobalt and manganese and a complexing agent to an amount sufficient to dissolve said metal ions. Th...

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Bibliographic Details
Main Authors AKIMITSU FUKUDA, YUTAKA TSUCHIYA
Format Patent
LanguageEnglish
Published 14.08.1985
Edition4
Subjects
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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Summary:The plated material is treated beforehand with an alkaline aqueous solution with a pH of 11 or more which contains ions of one or more of the metals selected from the group consisting of nickel, iron, cobalt and manganese and a complexing agent to an amount sufficient to dissolve said metal ions. The treatment removes segregated and concentrated aluminium at the plated material surface, which would otherwise tend to prevent phosphate formation.
Bibliography:Application Number: GB19850001457