EP 0930379 A1 19990721 - Method of chemical conversion coating for low-lead electrodeposition coating

Title (en)

Method of chemical conversion coating for low-lead electrodeposition coating

Title (de)

Verfahren zur Herstellung von Konversionsschichten für niedrigblei Elektrotauchschichten

Title (fr)

Procédé pour former des revêtements de conversion en vue d'appliquer des couches électrophorétiques à basse teneur en plomb

Publication

EP 0930379 A1 19990721 (EN)

Application

EP 99100326 A 19990112

Priority

JP 557698 A 19980114
JP 34538898 A 19981204

Abstract (en)

A method of pretreatment for low-lead electrodeposition with no lead or with a low lead content is provided, which comprises the step of forming a zinc phosphate film on a metal surface so that a corrosion resistance value according to the AC impedance method is not less than 2,500 OMEGA cm<2>, and then subjecting the substrated metal with a cationic electrodeposition coating with a lead concentration of not more than 300 ppm.

IPC 1-7

C23C 22/36; C25D 13/20

IPC 8 full level

C23C 22/12 (2006.01); C23C 22/18 (2006.01); C23C 22/36 (2006.01); C25D 13/20 (2006.01)

CPC (source: EP KR)

C23C 22/07 (2013.01 - KR); C23C 22/365 (2013.01 - EP); C25D 13/20 (2013.01 - EP)

Citation (search report)

[Y] EP 0454361 A2 19911030 - NIPPON PAINT CO LTD [JP]
[A] DE 4330002 C1 19950323 - HERBERTS GMBH [DE]
[A] DE 4434593 A1 19960404 - HERBERTS GMBH [DE]
[A] EP 0019430 A1 19801126 - AMCHEM PROD [US]
[A] EP 0287133 A1 19881019 - METALLGESELLSCHAFT AG [DE]
[A] EP 0401616 A1 19901212 - HENKEL KGAA [DE]
[A] FR 2203893 A1 19740517 - FOSFA COL SAS DI A DAL PANE ET [IT]
[A] EP 0459541 A1 19911204 - METALLGESELLSCHAFT AG [DE], et al
[A] WO 9320259 A1 19931014 - HENKEL KGAA [DE], et al
[PX] DE 19735314 A1 19980326 - BAYERISCHE MOTOREN WERKE AG [DE]
[XY] PATENT ABSTRACTS OF JAPAN vol. 096, no. 009 30 September 1996 (1996-09-30)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 0930379 A1 19990721; JP H11264076 A 19990928; KR 19990066876 A 19990816

DOCDB simple family (application)

EP 99100326 A 19990112; JP 34538898 A 19981204; KR 19980059393 A 19981228