EP 0459549 B1 19940817 - Production of conversion coatings on zinc or zinc alloy surfaces.
Title (en)
Production of conversion coatings on zinc or zinc alloy surfaces.
Title (de)
Erzeugung von Konversionsüberzügen auf Zink- oder Zinklegierungsoberflächen.
Title (fr)
Obtention de couches de conversion sur des surfaces en zinc ou en alliage de zinc.
Publication
Application
Priority
DE 4017186 A 19900529
Abstract (en)
[origin: EP0459549A1] In a process for producing conversion coatings on zinc or zinc alloy surfaces, in which the surfaces are contacted in a first stage with a solution which contains at least two different polyvalent metal ions and such a quantity of complexing agent that the polyvalent metal ions are held in solution, and has a pH of >/= 11, rinsing is carried out in a subsequent stage with a rinsing solution which contains aluminium, zirconium and fluoride and has been adjusted to a pH of </= 5. In preferred embodiments of the process, the total concentration of the Al + Zr + F is adjusted to a value between 0.1 and 8.0 g/l, preferably between 0.2 and 5.0 g/l, and the Al:Zr:F molar ratio is adjusted to (0.15 to 8.0):1:(5 to 52) or to (0.15 to 0.67):1:(5 to 7). The treatment duration and treatment temperature are advantageously 1 to 120 seconds, preferably 1 to 30 seconds, and 20 to 80 DEG C, preferably 20 to 50 DEG C, respectively. The process can be used with advantage as a pretreatment for subsequent coating, foil coating or adhesive coating.
IPC 1-7
IPC 8 full level
C23C 22/50 (2006.01); C23C 22/60 (2006.01); C23C 22/83 (2006.01); C23G 1/10 (2006.01)
CPC (source: EP)
C23C 22/34 (2013.01); C23C 22/60 (2013.01); C23C 22/73 (2013.01); C23C 22/83 (2013.01)
Citation (examination)
EP 0410497 A1 19910130 - METALLGESELLSCHAFT AG [DE], et al
Designated contracting state (EPC)
BE DE ES FR GB IT NL SE
DOCDB simple family (publication)
EP 0459549 A1 19911204; EP 0459549 B1 19940817; AU 633728 B2 19930204; AU 7617891 A 19911205; BR 9102173 A 19911224; CA 2041892 A1 19911130; CA 2041892 C 20001003; DE 4017186 A1 19911205; DE 59102544 D1 19940922; ES 2057734 T3 19941016; JP 3083872 B2 20000904; JP H04231479 A 19920820; ZA 914085 B 19930127
DOCDB simple family (application)
EP 91201020 A 19910429; AU 7617891 A 19910429; BR 9102173 A 19910528; CA 2041892 A 19910506; DE 4017186 A 19900529; DE 59102544 T 19910429; ES 91201020 T 19910429; JP 15248291 A 19910528; ZA 914085 A 19910529