Global Patent Index - EP 1002143 A1

EP 1002143 A1 2000-05-24 - ALKALINE STRIP PASSIVATION

Title (en)

ALKALINE STRIP PASSIVATION

Title (de)

ALKALISCHE BANDPASSIVIERUNG

Title (fr)

PASSIVATION ALCALINE DE BANDE

Publication

EP 1002143 A1 (DE)

Application

EP 98942626 A

Priority

  • DE 19733972 A
  • EP 9804670 W

Abstract (en)

[origin: DE19733972A1] The invention relates to a method for the alkaline passivation of galvanised and alloy-galvanised steel surfaces and of aluminium in strip plants. According to the invention, the metal surfaces are brought into contact with an alkaline aqueous solution containing complexers and iron, said solution having a free alkalinity level of between 5 and 20 points and an overall alkalinity level of between 7 and 30 points and containing 0.1 to 1 g/l magnesium ions, 0.1 to 1 g/l iron (III) ions and 0.5 to 5 g/l amino or hydroxycarboxylate ions. A repassivation with or without chromium can then be carried out.

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

C23C 22/60; C23C 22/66; C23C 22/83

IPC 8 full level (invention and additional information)

C23C 22/62 (2006.01); C23C 22/66 (2006.01)

CPC (invention and additional information)

C23C 22/60 (2013.01); C23C 22/66 (2013.01); C23C 22/73 (2013.01); C23C 22/83 (2013.01)

Citation (search report)

See references of WO 9907917A1

Designated contracting state (EPC)

BE DE ES FR GB IT SE

EPO simple patent family

DE 19733972 A1 19990211; AR 015142 A1 20010418; AU 730256 B2 20010301; AU 9069398 A 19990301; CA 2300275 A1 19990218; EP 1002143 A1 20000524; EP 1002143 B1 20020403; ES 2175763 T3 20021116; US 6346295 B1 20020212; WO 9907917 A1 19990218; ZA 9807032 B 19990208

INPADOC legal status


2007-12-31 [BERE] BE: LAPSED

- Owner name: *HENKEL K.G.A.A.

- Effective date: 20050731

2006-10-16 [REG ES FD2A] ANNOUNCEMENT OF LAPSE IN SPAIN

- Effective date: 20050726

2006-05-12 [REG FR ST] NOTIFICATION OF LAPSE

- Effective date: 20060331

2006-03-31 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20060331

2006-03-29 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Effective date: 20050725

2006-03-21 [EUG] SE: EUROPEAN PATENT HAS LAPSED

2006-02-01 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2003-03-26 [26N] NO OPPOSITION FILED

- Effective date: 20030106

2002-11-16 [REG ES FG2A] DEFINITIVE PROTECTION

- Document: ES 2175763 T3

2002-08-28 [GBT] GB: TRANSLATION OF EP PATENT FILED (GB SECTION 77(6)(A)/1977)

- Effective date: 20020806

2002-08-16 [ET] FR: TRANSLATION FILED

2002-05-08 [REF] CORRESPONDS TO:

- Document: DE 59803640 20020508

2002-04-03 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): BE DE ES FR GB IT SE

2002-01-01 [REG GB IF02] EUROPEAN PATENT IN FORCE AS OF 2002-01-01

2001-03-21 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010205

2000-05-24 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000129

2000-05-24 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE ES FR GB IT SE