EP 1090160 A1 20010411 - METHOD FOR CONTROLLING THE COATING WEIGHT FOR STRIP-PHOSPHATING
Title (en)
METHOD FOR CONTROLLING THE COATING WEIGHT FOR STRIP-PHOSPHATING
Title (de)
SCHICHTGEWICHTSTEUERUNG BEI BANDPHOSPHATIERUNG
Title (fr)
COMMANDE DE POIDS DE COUCHE LORS DE LA PHOSPHATATION D'UNE BANDE
Publication
Application
Priority
- DE 19808755 A 19980302
- EP 9901108 W 19990220
Abstract (en)
[origin: US6461450B1] A process for controlling the layer weight during the phosphating of steel strip zinc-coated on one or both sides, using a phosphating solution which contains 1 to 6 g/l zinc ions and 10 to 30 g/l phosphate ions, characterized in that a Fe(II) ion content within the range of 3 to 100 mg/l is established in the phosphating solution. The higher the Fe(II) content, the lower is the layer weight. An alteration in the Fe(II) content of 3 to 20 mg/l results in an alteration in the layer weight of about 0.1 g/m2.
IPC 1-7
IPC 8 full level
C23C 22/12 (2006.01); C23C 22/13 (2006.01); C23C 22/17 (2006.01); C23C 22/18 (2006.01); C23C 22/22 (2006.01); C23C 22/77 (2006.01)
CPC (source: EP KR US)
C23C 22/12 (2013.01 - EP US); C23C 22/13 (2013.01 - EP US); C23C 22/184 (2013.01 - EP KR US); C23C 22/188 (2013.01 - KR); C23C 22/77 (2013.01 - KR)
Citation (search report)
See references of WO 9945171A1
Designated contracting state (EPC)
AT BE DE ES FR GB IT LU NL
DOCDB simple family (publication)
US 6461450 B1 20021008; AT E239807 T1 20030515; AU 3253499 A 19990920; DE 19808755 A1 19990909; DE 59905477 D1 20030612; EP 1090160 A1 20010411; EP 1090160 B1 20030507; JP 2002505383 A 20020219; KR 20010074665 A 20010808; WO 9945171 A1 19990910
DOCDB simple family (application)
US 62333401 A 20010216; AT 99937820 T 19990220; AU 3253499 A 19990220; DE 19808755 A 19980302; DE 59905477 T 19990220; EP 9901108 W 19990220; EP 99937820 A 19990220; JP 2000534698 A 19990220; KR 20007009745 A 20000902