Chemistry: electrical and wave energy – Processes and products
Patent
1987-04-20
1988-03-01
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
204 381, C25D 1100
Patent
active
047284013
ABSTRACT:
An improved process for preparing a phosphated metal surface for painting comprises electrolyzing the surface as cathode in an aqueous solution containing hexavalent and trivalent chromium in specified concentrations and weight ratios.
REFERENCES:
patent: 4137132 (1979-01-01), Ward et al.
patent: 4547268 (1985-10-01), Bruno
Miyawaki Toshi
Saito Yoshikazu
Yoshida Atsunori
Andrews R. L.
Kluegel Arthur E.
Nihon Parkerizing Co. Ltd.
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