초록 ▼

A process for phosphating metal surfaces by treatment with an acidic zinc- and phosphathe-containing solution which does not require rinsing. The metal substrate is contacted with a phosphating solution containing 2 to 25 g/l of zinc ions, 2 to 25 g/l of manganese ions and 50 to 300 g/l of phosphate

A process for phosphating metal surfaces by treatment with an acidic zinc- and phosphathe-containing solution which does not require rinsing. The metal substrate is contacted with a phosphating solution containing 2 to 25 g/l of zinc ions, 2 to 25 g/l of manganese ions and 50 to 300 g/l of phosphate ions. The solution has a pH value of 1 to 3.6, a free acid content of 0 to 100 points, a total acid content of 40 to 400 points and a ratio of free acid to total acid of 1:4 to 1:20.

대표청구항 ▼

[ We claim:] [1.] In a process for phosphating a surface of steel, zinc, aluminium or their alloys by treatment with an acidic, zinc- and phosphate-containing solution and drying the surface without rinsing, the improvement which comprises: contacting the surface with a phosphating solution containi

[ We claim:] [1.] In a process for phosphating a surface of steel, zinc, aluminium or their alloys by treatment with an acidic, zinc- and phosphate-containing solution and drying the surface without rinsing, the improvement which comprises: contacting the surface with a phosphating solution containing 2 to 25 g/l of zinc ions, 2 to 25 g/l of manganese ions and 50 to 300 g/l of phosphate ions and having a pH value of 1 to 3.6, a free acid content of 0 to 100 points, a total acid content of 40 to 400 points and a ratio of free acid to total acid not greater than 1:4.