Phosphatized and painted metal articles

Claim 2

A coated ferruginous substrate having on the surface thereof an adherent, corrosion-resistant and water-insoluble composite surface coating, which coating comprises a base coating on the substrate surface of a water-insoluble, complex phosphatized coating of the iron phosphate type obtained by contacting said ferruginous substrate with an organic solvent and water-containing liquid phosphatizing composition containing water in minor amount but in an amount exceeding phosphoric acid in said composition while being sufficient for said composition to provide a phosphatized coating of substantial water insolubility, said coating containing, in addition to trace elements, the elements iron, phosphorous, and oxygen plus carbon and nitrogen, and having a coating surface ratio of oxygen atoms to phosphorous atoms of at least about 4:1, and a coating surface ratio of carbon atoms to phosphorous atoms of greater than about 1.5:1, and on said base coating a paint topcoating from a paint topcoat composition.

Claim 3

The coated substrate of claim 1 wherein said paint topcoat composition is a water-reducible paint coating composition.

Claim 4

The coated substrate of claim 1 wherein said ferruginous substrate is a steel substrate and the base coating on said substrate is present in an amount between about 10 and about 200 milligrams per square foot.

Claim 5

A coated metal substrate having on the surface thereof an adherent, corrosion-resistant and water-insoluble composite coating, which coating comprises a water-insoluble phosphatized base coating on the metal obtained by contacting said metal substrate with an organic solvent and water-containing liquid composition containing water in minor amount, said coating containing, in addition to trace elements, the element iron, phosphorous and oxygen plus carbon and nitrogen, and having a coating surface ratio of oxygen atoms to phosphorous atoms of at least about 4:1, and a coating surface ratio of carbon atoms to phosphorous atoms of greater than 1.5:1, and on said base coating a paint topcoating from a paint topcoat compositon, with said base coating being obtained by contacting said metal substrate with organic phosphatizing composition comprising: (A) organic solvent providing liquid phase homogeneity with an organic solubilizing liquid while being a nonsolvent for a phosphatizing proportion of phosphoric acid in said composition, said organic solvent being unreactive with phosphoric acid in said composition; (B) solubilizing liquid capable of solubilizing phosphoric acid in said composition while retaining liquid phase composition homogeneity, said solubilizing liquid being unreactive with phosphoric acid in said composition; (C) a phosphatizing proportion of phosphoric acid; and, (D) water in an amount exceeding said proportion of phosphoric acid while being sufficient for said composition to provide a phosphatized coating of substantial water insolubility on a metal substrate in phosphatizing contact with said composition, and while retaining liquid phase homogeneity.

Claim 6

A coated metal substrate having on the surface thereof an adherent, corrosion-resistant and water-insoluble composite coating, which coating comprises a water-insoluble phosphatized base coating on the metal obtained by contacting said metal substrate with an organic solvent and water-containing liquid composition containing water in minor amount, said coating containing, in addition to trace elements, the element iron, phosphorous and oxygen plus carbon and nitrogen, and having a coating surface ratio of oxygen atoms to phosphorous atoms of at least about 4:1, and a coating surface ratio of carbon atoms to phosphorous atoms of greater than 1.5:1, and on said base coating a paint topcoating from a paint topcoat compositon, with said base coating being obtained by contacting said metal substrate with organic phosphatizing composition comprising: (A) organic solvent providing liquid phase homogeneity with an organic solubilizing liquid while being a nonsolvent for a phosphatizing proportion of phosphoric acid in said composition, said organic solvent being unreactive with phosphoric acid in said composition; (B) solubilizing liquid capable of solubilizing phosphoric acid in said composition while retaining liquid phase composition homogeneity, said solubilizing liquid being unreactive with phosphoric acid in said composition; (C) a phosphatizing proportion of phosphoric acid; and, (D) water in an amount exceeding said proportion of phosphoric acid while being sufficient for said composition to provide a phosphatized coating of substantial water insolubility on a metal substrate in phosphatizing contact with said composition, and while retaining liquid phase homogeneity.

Claim 7

The coated substrate of claim 4 wherein said paint topcoat composition is a water-reducible paint coating composition.

Claim 8

The coated substrate of claim 4 wherein said base coating is a phosphatized coating on a ferruginous substrate from an organic phosphatizing composition containing methylene chloride organic solvent and said base coating is present in an amount between about 10 and about 200 milligrams per square foot.

Claim 9

A coated metal substrate having on the surface thereof an adherent, corrosion-resistant and water-insoluble composite coating, which coating comprises a water-insoluble phosphatized base coating on the metal obtained by contacting said metal substrate with an organic solvent and water-containing liquid phosphatizing composition containing water in minor amount, said coating containing in addition to trace elements, the elements iron, phosphorous and oxygen plus carbon and nitrogen, and having a coating surface ratio of oxygen atoms to phosphorous atoms of at least about 4:1, and a coating surface ratio of carbon atoms to phosphorous atoms of greater than about 1.5:1, with the subsequent coating of the composite being from a non-phosphatizing solution for treating metal surfaces and with the topcoating of the composite being a paint coating from a paint topcoat composition, wherein said base coating is obtained by contacting said metal substrate with organic phosphatizing composition comprising: (A) organic solvent providing liquid phase homogeneity with an organic solubilizing liquid while being a non-solvent for a phosphatizing proportion of phosphoric acid in said composition, said organic solvent being unreactive with phosphoric acid in said composition; (B) solubilizing liquid capable of solubilizing phosphoric acid in said composition while retaining liquid phase composition homogeneity, said solubilizing liquid being unreactive with phosphoric acid in said composition; (C) a phosphatizing proportion of phosphoric acid; and, (D) water in an amount exceeding said proportion of phosphoric acid while being sufficient for said composition to provide a phosphatized coating of substantial water insolubility on a metal substrate in phosphatizing contact with said composition, and while retaining liquid phase homogeneity.

Claim 10

A coated metal substrate having on the surface thereof an adherent, corrosion-resistant and water-insoluble composite coating, which coating comprises a water-insoluble phosphatized base coating on the metal obtained by contacting said metal substrate with an organic solvent and water-containing liquid phosphatizing composition containing water in minor amount, said coating containing in addition to trace elements, the elements iron, phosphorous and oxygen plus carbon and nitrogen, and having a coating surface ratio of oxygen atoms to phosphorous atoms of at least about 4:1, and a coating surface ratio of carbon atoms to phosphorous atoms of greater than about 1.5:1, with the subsequent coating of the composite being from a non-phosphatizing solution for treating metal surfaces and with the topcoating of the composite being a paint coating from a paint topcoat composition, wherein said base coating is obtained by contacting said metal substrate with organic phosphatizing composition comprising: (A) organic solvent providing liquid phase homogeneity with an organic solubilizing liquid while being a non-solvent for a phosphatizing proportion of phosphoric acid in said composition, said organic solvent being unreactive with phosphoric acid in said composition; (B) solubilizing liquid capable of solubilizing phosphoric acid in said composition while retaining liquid phase composition homogeneity, said solubilizing liquid being unreactive with phosphoric acid in said composition; (C) a phosphatizing proportion of phosphoric acid; and, (D) water in an amount exceeding said proportion of phosphoric acid while being sufficient for said composition to provide a phosphatized coating of substantial water insolubility on a metal substrate in phosphatizing contact with said composition, and while retaining liquid phase homogeneity.

Claim 11

The coated substrate of claim 7 wherein said base coating is present in an amount between about 10 and about 200 milligrams per square foot, said non-phosphatizing solution for treating metal surface contains chromium and said chromium is present in the subsequent coating in an amount from about 2 to about 40 milligrams per square foot.

Claim 12

The coated substrate of claim 7 characterized by having a topcoating from a water-reducible coating composition.

Claim 13

The coated substrate of claim 7 wherein said base coating is phosphatized coating from an organic phosphatizing composition containing methylene chloride organic solvent.

Claim 14

A coated ferruginous substrate having on the surface thereof an adherent, corrosion-resistant and water-insoluble composite surface coating, which coating comprises a base coating on the substrate surface of a water-insoluble, complex phosphatized coating of the iron phosphate type obtained by contacting said ferruginous substrate with an organic solvent and water-containing liquid phosphatizing composition containing water in minor amount, said coating and containing, in addition to trace elements, the elements iron, phosphorous, and oxygen plus carbon and nitrogen, and having a coating surface ratio of oxygen atoms to phosphorous atoms of at least about 4:1, and a coating surface ratio of carbon atoms to phosphorous atoms of greater than about 1.5:1, with a subsequent coating in the composite being from a non-phosphatizing solution for treating metal surfaces, and with the topcoating of the composite being a paint coating from a paint topcoat composition, wherein the base coating is obtained by contacting said metal substrate with an organic phosphatizing composition comprising methylene chloride, solubilizing solvent capable of solubilizing phosphoric acid in methylene chloride, a phosphatizing proportion of phosphoric acid, and water in an amount exceeding said proportion of phosphoric acid, while being sufficient for said composition to provide a phosphatized coating of substantial water insolubility on said ferruginous substrate, and while and while retaining liquid phase homogeneity.

Claim 15

A coated ferruginous substrate having on the surface thereof an adherent, corrosion-resistant and water-insoluble composite surface coating, which coating comprises a base coating on the substrate surface of a water-insoluble, complex phosphatized coating of the iron phosphate type obtained by contacting said ferruginous substrate with an organic solvent and water-containing liquid phosphatizing composition containing water in minor amount, said coating and containing, in addition to trace elements, the elements iron, phosphorous, and oxygen plus carbon and nitrogen, and having a coating surface ratio of oxygen atoms to phosphorous atoms of at least about 4:1, and a coating surface ratio of carbon atoms to phosphorous atoms of greater than about 1.5:1, with a subsequent coating in the composite being from a non-phosphatizing solution for treating metal surfaces, and with the topcoating of the composite being a paint coating from a paint topcoat composition, wherein the base coating is obtained by contacting said metal substrate with an organic phosphatizing composition comprising methylene chloride, solubilizing solvent capable of solubilizing phosphoric acid in methylene chloride, a phosphatizing proportion of phosphoric acid, and water in an amount exceeding said proportion of phosphoric acid, while being sufficient for said composition to provide a phosphatized coating of substantial water insolubility on said ferruginous substrate, and while and while retaining liquid phase homogeneity.

Claim 16

The coated substrate of claim 11 wherein said ferruginous substrate is a steel substrate and the base coating on said substrate is present in an amount between about 10 and about 200 milligrams per square foot.

Claim 17

The coated substrate of claim 11 wherein said non-phosphatizing solution for treating metal surfaces contains chromium and said chromium in the subsequent coating is present in an amount from about 2 to about 40 milligrams per square foot.