EP 0032306 B1 19850502 - ALUMINIUM-COATING SOLUTION, PROCESS AND CONCENTRATE
Title (en)
ALUMINIUM-COATING SOLUTION, PROCESS AND CONCENTRATE
Publication
Application
Priority
- US 10701779 A 19791226
- US 16573480 A 19800703
Abstract (en)
[origin: EP0032306A1] A chromate-free acidic aqueous conversion-coating solution which is effective in forming a clear, colourless, corrosion-resistant conversion-coating on an aluminium surface, to which moreover subsequently-applied overlying siccative coatings will adhere tightly, contains a Group IVa metal selected from the group consisting of zirconium, titanium, hafnium and mixtures thereof, as well as fluoride and one or more additives, namely a polyhydroxy compound having no more than 7 carbon atoms, the solution being in that event free of phosphate and boron, or a surfactant or a mixture of said surfactant and said poly-hydroxy compound. The coating-solution is employed in processes for forming conversion-coatings on aluminium surfaces, especially those of aluminium cans, which may thereafter be given a decorative and/or sanitary lacquer or other siccative coating. The coated aluminium is shown to have superior properties. Concentrates are disclosed for making up and also for replenishing the coating solution.
IPC 1-7
IPC 8 full level
C23C 22/34 (2006.01)
CPC (source: EP)
C23C 22/34 (2013.01)
Citation (examination)
Metals Handbook, Vol. 2, page 627, 1976
Designated contracting state (EPC)
AT BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0032306 A1 19810722; EP 0032306 B1 19850502; AU 543720 B2 19850502; AU 6584780 A 19810702; BR 8008489 A 19810714; CA 1174945 A 19840925; DE 3070603 D1 19850605; DK 553280 A 19810627; ES 498079 A0 19821101; ES 8300142 A1 19821101; MX 157394 A 19881122; NO 803937 L 19810629; NZ 195810 A 19830715; PL 131953 B1 19850131; PL 228759 A1 19810904
DOCDB simple family (application)
EP 80304673 A 19801222; AU 6584780 A 19801224; BR 8008489 A 19801223; CA 366731 A 19801212; DE 3070603 T 19801222; DK 553280 A 19801223; ES 498079 A 19801223; MX 18535380 A 19801217; NO 803937 A 19801223; NZ 19581080 A 19801211; PL 22875980 A 19801224