Global Patent Index - EP 0827785 A3

EP 0827785 A3 2000-01-12 - Process for making protecting layers on flat shaped products made of titanium zinc

Title (en)

Process for making protecting layers on flat shaped products made of titanium zinc

Title (de)

Verfahren zur Herstellung von Schutzschichten auf Flacherzeugnissen aus Titanzink

Title (fr)

Procédé pour faire une couche de protection sur des tôles de zinc au titane

Publication

EP 0827785 A3 (DE)

Application

EP 97114344 A

Priority

DE 19636370 A

Abstract (en)

[origin: EP0827785A2] A process for the production of protective coatings (I) of a uniform colouring by etching rolled titanium zinc sheet products (II) in the form of band, sheet or strips for use in construction is claimed. (II) is etched in a bath containing sulphuric and nitric acids, rinsed and a protective layer (I) formed by passivation through the application of a chromate containing polymer (III).Also claimed is (II) treated such that the protective layer (I) is 0.4-3.0, preferably 1-2 microns thick and has a chromate content of 5-40 mg/m<2>.

IPC 1-7

B05D 7/14

IPC 8 full level

B05D 7/00 (2006.01); C23C 22/53 (2006.01)

CPC

B05D 7/51 (2013.01); C23C 22/53 (2013.01)

Citation (search report)

[DA] DE 2757592 A1 19790705 - RHEINISCHES ZINKWALZWERK GMBH

DCS

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

EP 0827785 A2 19980311; EP 0827785 A3 20000112; EP 0827785 B1 20030226; DE 19636370 A1 19980312; DE 19636370 B4 20050414; DK 0827785 T3 20030623