Global Patent Index - EP 1060290 A1

EP 1060290 A1 2000-12-20 - AQUEOUS SOLUTION AND METHOD FOR PHOSPHATIZING METALLIC SURFACES

Title (en)

AQUEOUS SOLUTION AND METHOD FOR PHOSPHATIZING METALLIC SURFACES

Title (de)

WÄSSRIGE LÖSUNG UND VERFAHREN ZUR PHOSPHATIERUNG METALLISCHER OBERFLÄCHEN

Title (fr)

SOLUTION AQUEUSE ET PROCEDE POUR PHOSPHATER DES SURFACES METALLIQUES

Publication

EP 1060290 A1 (DE)

Application

EP 99911702 A

Priority

  • DE 19808440 A
  • EP 9901186 W

Abstract (en)

[origin: DE19808440A1] The invention relates to an aqueous solution containing phosphate for producing phosphate layers on metallic surfaces made of iron, steel, zinc, zinc alloys, aluminum or aluminum alloys. Said solution contains 0.3 to 5 g Zn<2+> /1, 0.1 to 2 g nitroguanidine/1 and 0.05 to 0.5 g hydroxylamine/1, whereby the S-value is between 0.03 and 0.3, and the ratio of the weight of Zn<2+> to P2O5 = 1:5 to 1:30. The invention also relates to a phosphatizing method in which the metallic surfaces are cleaned, then treated with said aqueous solution containing phosphate for a period of 5 seconds to 10 minutes at a temperature ranging from 15 to 70 DEG C, and finally, are rinsed with water.

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

C23C 22/12; C23C 22/13; C23C 22/18

IPC 8 full level (invention and additional information)

C23C 22/12 (2006.01); C23C 22/13 (2006.01); C23C 22/18 (2006.01)

CPC (invention and additional information)

C23C 22/182 (2013.01); C23C 22/12 (2013.01); C23C 22/13 (2013.01); C23C 22/365 (2013.01)

Citation (search report)

See references of WO 9943868A1

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

DE 19808440 A1 19990909; DE 19808440 C2 20000824; AT 224466 T 20021015; AU 3029899 A 19990915; AU 740987 B2 20011122; BR 9909236 A 20001114; CA 2325012 A1 19990902; CN 1292041 A 20010418; EP 1060290 A1 20001220; EP 1060290 B1 20020918; JP 2002505378 A 20020219; PL 342623 A1 20010618; SI 20378 A 20010430; SK 12352000 A3 20010510; TR 200002495 T2 20001221; US 6497771 B1 20021224; WO 9943868 A1 19990902

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