Global Patent Index - EP 0987350 A2

EP 0987350 A2 2000-03-22 - Process and apparatus for applying a phosphate coating on workpieces

Title (en)

Process and apparatus for applying a phosphate coating on workpieces

Title (de)

Verfahren und Vorrichtung zum Aufbringen eines Phosphatüberzuges auf Werkstücke

Title (fr)

Procédé et dipositif pour appliquer sur des pièces une couche de phosphate

Publication

EP 0987350 A2 (DE)

Application

EP 99890263 A

Priority

AT 136398 A

Abstract (en)

A long ferrous metal workpiece is phosphate coated by passing the heated moving workpiece through a phosphating bath while supplying an electric (preferably cathodic) current. A phosphate coating is applied onto a long ferrous metal workpiece by heating the moving workpiece and then passing it through a phosphating bath with a dwell time of 1.5-19 (preferably 4-9) sec. in the presence of an electric (preferably cathodic) current. An Independent claim is also included for a phosphate coating apparatus for carrying out the above process, in which the phosphating unit (5) is preceded by a workpiece preheater (3) and is in the form of an electrolytic unit with a tubular electrode surrounding the workpiece (11).

Abstract (de)

Die Erfindung bezieht sich auf ein Verfahren zum Aufbringen eines Phosphatüberzuges auf Werkstücke mit großer Längserstrekcung aus Eisenbasis - Legierungen mit Anwendung von elektrischem Strom und eine dergleichen Vorrichtung. Erfindungsgemäß wird dabei das Werkstück in Längsrichtung bewegt und hintereinander folgend auf höhere Temperatur gebracht, durch ein Behandlungsbad geführt und während einer Durchlaufzeit wischen 1,5 und 19 Sekunden dessen Oberfläche mit Einwirken von elektrischem Strom bei Einstellung der elektrischen Werte in Anhängigkeit von den Behandlungsparametern phosphatiert. Bei einer erfindungsgemäßen Vorrichtung weisen die Einzelkomponenten jeweils eine derartige Form auf, daß das Werkstück (11) in Längsrichtung (Z) durch diese durchbewegbar ist und daß der mit elektrischem Strom versorgbaren Phosphatier-Einheit (5) mindestens eine Erwärmungs-Einrichtung (3) vorgeordnet ist. <IMAGE>

IPC 1-7 (main, further and additional classification)

C25D 11/36

IPC 8 full level (invention and additional information)

C25D 11/36 (2006.01)

CPC (invention and additional information)

C25D 11/36 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0987350 A2 20000322; EP 0987350 A3 20040324; EP 0987350 B1 20060628; AT 405947 B 19991227; AT A136398 A 19990515; CZ 295733 B6 20051012; CZ 9902710 A3 20000315; DE 59913624 D1 20060810; ES 2268846 T3 20070316

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2006-02-15 [RTI1] TITLE (CORRECTION)

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