Global Patent Index - EP 1019564 A1

EP 1019564 A1 2000-07-19 - METHOD FOR PHOSPHATIZING A STEEL STRIP

Title (en)

METHOD FOR PHOSPHATIZING A STEEL STRIP

Title (de)

VERFAHREN ZUR PHOSPHATIERUNG VON STAHLBAND

Title (fr)

PROCEDE DE PHOSPHATATION D'UN FEUILLARD D'ACIER

Publication

EP 1019564 A1 (DE)

Application

EP 98949988 A

Priority

  • DE 19740953 A
  • EP 9805634 W

Abstract (en)

[origin: DE19740953A1] High speed spray or dip phosphating of optionally galvanized steel strip is carried out using a nitrate-free acid phosphating solution which contains 1-4 g/l zinc ions, 1.2-4 g/l manganese ions, 1-4 g/l magnesium ions, 10-30 g/l phosphate ions and 0.1-3 g/l free or combined hydroxylamine and which has free and total acid contents of 0.4-4 points and 15-45 points respectively.

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

C23C 22/18; C23C 22/36

IPC 8 full level (invention and additional information)

C23C 22/18 (2006.01); C23C 22/36 (2006.01)

CPC (invention and additional information)

C23C 22/182 (2013.01); C23C 22/188 (2013.01); C23C 22/368 (2013.01)

Citation (search report)

See references of WO 9914397A1

Designated contracting state (EPC)

AT BE DE FR GB NL

EPO simple patent family

DE 19740953 A1 19990318; CA 2303877 A1 19990325; EP 1019564 A1 20000719; WO 9914397 A1 19990325

INPADOC legal status


2003-05-02 [18R] REFUSED

- Effective date: 20021208

2001-01-10 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20001124

2000-09-20 [RIN1] INVENTOR (CORRECTION)

- Inventor name: RIESOP, JOERG

2000-09-20 [RIN1] INVENTOR (CORRECTION)

- Inventor name: SEIDEL, REINHARD

2000-07-19 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000308

2000-07-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE DE FR GB NL