Global Patent Index - EP 1029111 A1

EP 1029111 A1 2000-08-23 - CORROSION PROTECTION FOR GALVANISED AND ALLOY GALVANISED STEEL STRIPS

Title (en)

CORROSION PROTECTION FOR GALVANISED AND ALLOY GALVANISED STEEL STRIPS

Title (de)

KORROSIONSSCHUTZ VON VERZINKTEN UND LEGIERUNGSVERZINKTEN STAHLBÄNDERN

Title (fr)

PROTECTION ANTI-CORROSION DE FEUILLARDS ACIER GALVANISES ET GALVANISES PAR ALLIAGE

Publication

EP 1029111 A1 (DE)

Application

EP 98959815 A

Priority

  • DE 19749508 A
  • EP 9806889 W

Abstract (en)

[origin: DE19749508A1] The invention relates to a method for providing galvanised or alloy galvanised steel strips with corrosion protection, characterised in that the galvanised or alloy galvanised steel strips are brought into contact with an aqueous treatment solution with a pH value of between 1.5 and 3.5, containing 1 to 20 g/l manganese (II) ions and 1 to 150 g/l phosphate ions, and in that the solution is dried without intermediate rinsing. The solution may optionally also contain up to 10 g/l zinc ions, up to 10 g/l nickel ions, up to 20 g/l titanium ions, up to 50 g/l silicon in the form of silicon compounds, up to 30 g/l fluoride ions, up to 150 g/l of one or several polymers or copolymers of polymerisable carboxylic acids chosen from the following: acrylic acid, methacrylic acid, maleic acid and their esters with alcohols with 1 to 6 C-atoms. The invention also relates to metal strips which have been treated in this way.

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 22/18 (2013.01); C23C 22/182 (2013.01); C23C 22/364 (2013.01)

Citation (search report)

See references of WO 9924638A1

Designated contracting state (EPC)

AT BE DE ES FI FR GB IT NL SE

EPO simple patent family

DE 19749508 A1 19990512; AT 221144 T 20020815; AU 1558399 A 19990531; AU 735849 B2 20010719; BR 9813180 A 20000822; CA 2309581 A1 19990520; CA 2309581 C 20070410; EP 1029111 A1 20000823; EP 1029111 B1 20020724; ES 2180217 T3 20030201; HU 0100106 A2 20010528; HU 0100106 A3 20040628; JP 2001522941 A 20011120; US 6537387 B1 20030325; WO 9924638 A1 19990520; ZA 9810120 B 19990510

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