Method for applying a phosphate covering and use of metal parts thus phospated
AssigneeChemetall GmbH
InventorsHardy Wietzoreck, Klaus Bittner, Thomas Kolberg, Marion Wegner, Thomas Wendel, Gerrit Schüllermann
Life of this patent
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Abstract
Metallic surfaces are coated with an aqueous, acidic phosphate solution containing 10 to 60 g/l zinc, 0.5 to 40 g/l manganese, 50 to 300 g/l phosphate ions calculated as P2O5, and optionally other components.
Claims35
A method comprising applying a phosphate coating to a metallic coil by wetting a surface of the metallic coil with an aqueous, acidic phosphating solution and drying the phosphating solution on the coated surface of the coil to form a crystalline-coating on said metallic coil, wherein the phosphating solution comprises 26 to 60 g/l of zinc ions;
- at least 5 to 40 g/l of manganese ions;
- 50 to 300 g/l of phosphate ions, calculated as P2O5 and 25 to 120 g/l of peroxide calculated as H2O2, to form a coating having a coating weight in the range of from 0.2 to 5 g/m2.
A method comprising applying a phosphate coating to a metallic coil by wetting a surface coil metallic with an aqueous, acidic phosphating solution and drying of the phosphating solution to form a crystalline coating on the surface of the coil, wherein the phosphating solution comprises 10 to 60 g/l of zinc ions;
- 0.5 to 40 g/l of manganese ions;
- 50 to 300 g/l of phosphate ions, calculated as P2O5;
- and 25 to 120 g/l of peroxide ions, calculated as H2O2 to form a coating having a coating weight of from 0.2 to 5 g/m2.
A method comprising applying a phosphate coating to a metallic surface by wetting the surface with an aqueous, acidic phosphating solution and drying the phosphating solution on the coated surface to form a coating on said metallic surface, wherein the phosphating solution comprises 26 to 60 g/l of zinc ions;
- at least 5 to 40 g/l of manganese ions;
- 50 to 300 g/l of phosphate ions, calculated as P2O5, and 25 to 120 g/l of peroxide ions, calculated as H2O2.
A method comprising applying a phosphate coating to a metallic surface by wetting the metallic surface with an aqueous, acidic phosphating solution and drying of the phosphating solution to form a coating on the metallic surface, wherein the pbosphating solution comprises 10 to 60 g/l of zinc ions;
- at least 5 to 40 g/l of manganese ions;
- 50 to 300 g/l of phosphate ions, calculated as P2O5;
- and 25 to 120 g/l of peroxide ions, calculated as H2O2 to form a coating having a coating weight of from 0.2 to 5g/m2.
A method comprising applying a phosphate coating to a metalic surface by wetting the surface with an aqueous, acidic phosphating solution and drying the phosphating solution on the coated surface to form a coating on said metallic surface, wherein the phosphating solution comprises 26 to 60 g/l of zinc ions;
- at least 5 to 40 g/l of manganese ions;
- 50 to 300 g/l of phosphate ions, calculated as P2O5, and 25 to 120 g/l of peroxide ions. calculated as H2O2, and contacting the resultant coated metallic surface with a second phosphating solution.
A method comprising applying a phosphate coating to a metallic surface by wetting the metallic surface with an aqueous, acidic phosphating solution and drying of the phosphating solution to form a coating on the metallic surface, wherein the phosphating solution comprises 10 to 60 g/l of zinc ions;
- at least 5 to 40 g/l of manganese ions;
- 50 to 300 g/l of phosphate ions, calculated as P2O5;
- and 25 to 120 g/l of peroxide ions, calculated as H2O2 and contacting the resultant coated metallic surface with a second phosphating solution, wherein a coating having a coating weight of from 0.2 to 5 g/m2.
Dependencies are inferred from the claim text.