Phosphating process with a copper-containing re-rinsing stage

摘要

PCT No. PCT/EP96/01196 Sec. 371 Date Sep. 29, 1997 Sec. 102(e) Date Sep. 29, 1997 PCT Filed Mar. 20, 1996 PCT Pub. No. WO96/30559 PCT Pub. Date Oct. 3, 1996A process for phosphating metal surfaces in which a nitrite- and nickel-free zinc-containing phosphating solution is applied to the metal surfaces which, if desired, are then rinsed and subsequently after-rinsed with an aqueous solution with a pH value of 3 to 7 which contains 0.001 to 10 g/l of one or more of the cations of Li, Cu and Ag.