Electrodeposition coatings including a lanthanide series element for use over aluminum substrates

A process for applying a coating on aluminum substrates by anionic or cationic electrodeposition of an electrodeposition coating including an aqueous dispersion of one or more lanthanide series elements having a +3/+4 oxidation state and phosphated epoxy resin made by phosphating a polyepoxide with...

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Bibliographische Detailangaben
Hauptverfasser: PEFFER, ROBIN M, RAKIEWICZ, EDWARD F
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A process for applying a coating on aluminum substrates by anionic or cationic electrodeposition of an electrodeposition coating including an aqueous dispersion of one or more lanthanide series elements having a +3/+4 oxidation state and phosphated epoxy resin made by phosphating a polyepoxide with both phosphoric acid and an organophosphonic acid and/or an organophosphinic acid. The coating has a reduced tendency to form pinholes.