Global Patent Index - EP 0977908 A1

EP 0977908 A1 2000-02-09 - CONDITIONING METAL SURFACES PRIOR TO PHOSPHATE CONVERSION COATING

Title (en)

CONDITIONING METAL SURFACES PRIOR TO PHOSPHATE CONVERSION COATING

Title (de)

KONDITIONIEREN EINER MATALLOBERFLÄCHE VOR DEM PHOSPHATKONVERSIONSBESCHICHTEN

Title (fr)

CONDITIONNEMENT DE SURFACES METALLIQUES PREALABLEMENT A LA PHOSPHATATION

Publication

EP 0977908 A1 (EN)

Application

EP 98908792 A

Priority

  • JP 5218197 A
  • US 9803934 W

Abstract (en)

[origin: WO9839498A1] A pretreatment before phosphating conversion coating is effected by contacting a metal substrate to be coated with a pretreatment composition that has a pH from 4 to 13 and contains dispersed fine particle size alkali metal or ammonium salts and divalent or trivalent metal phosphates. The conditioning achieved is as good as with conventional Jernstedt salts and the pretreatment compositions according to the invention are more storage stable.

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

C23C 22/78

IPC 8 full level (invention and additional information)

C23C 22/07 (2006.01); C23C 22/78 (2006.01)

CPC (invention and additional information)

C23C 22/78 (2013.01)

Designated contracting state (EPC)

DE ES FR GB IT

DOCDB simple family

WO 9839498 A1 19980911; AU 6673698 A 19980922; CA 2283387 A1 19980911; CA 2283387 C 20070703; CN 1197849 A 19981104; CN 1198958 C 20050427; DE 69817803 D1 20031009; DE 69817803 T2 20040701; EP 0977908 A1 20000209; EP 0977908 A4 20000607; EP 0977908 B1 20030903; ES 2205456 T3 20040501; ID 20532 A 19990107; JP 3451334 B2 20030929; JP H10245685 A 19980914; MY 124633 A 20060630; TW 371675 B 19991011; ZA 9801796 B 19980907