Composition for Metal Surface Treatment, Metal Surface Treatment Method, and Metal Material

Abstract

Disclosed is a composition for metal surface treatment which enables to form a chemical conversion coating film which achieves sufficient foundation surface concealment, coating adhesion and corrosion resistance. Also disclosed is a method for treating the surface of a metal material wherein such a composition for metal surface treatment is used. Specifically disclosed is a metal surface treatment composition used for a treatment of a metal surface, which composition contains a zirconium compound and/or a titanium compound, and a polyamine compound having a number average molecular weight of not less than 150 but not more than 500,000. The polyamine compound contains not less than 0.1 millimole but not more than 17 millimoles of a primary and/or secondary amino group per 1 g of the solid content, and the content of the zirconium compound and/or titanium compound in the metal surface treatment composition is not less than 10 ppm but not more than 10,000 ppm in terms of metal elements. The mass ratio of the zirconium element and/or titanium element contained in the zirconium compound and/or titanium compound relative to the polyamine compound is not less than 0.1 but not more than 100.

1 - 23 . (canceled) 
     
     
         24 . A metal material treated by a metal surface treatment method comprising:
 a treatment solution contact step of contacting with said metal material, a metal surface treatment solution containing   at least one selected from the group consisting a zirconium compound and titanium compound, and   a polyamine compound having a number average molecular weight from 150 to 500,000, wherein   said polyamine compound contains from 0.1 mmol to 17 mmol of at least one selected from the group consisting primary and secondary amino group per 1 g of solid content,   a content of at least one selected from the group consisting said zirconium compound and titanium compound in said metal surface treatment composition is from 10 ppm to 10,000 ppm with respect to the metal element,   a mass ratio of at least one selected from the group consisting zirconium element and titanium element included in at least one selected from the group consisting said zirconium compound and titanium compound is from 0.1 to 100, with respect to said polyamine compound, and   said polyamine compound is a compound having at least one siloxane unit; and   a water washing step of washing with water the metal material after said treatment solution contact step.   
     
     
         25 . The metal material according to  claim 24 , having a surface treatment coating layer on an iron-based metal material surface, wherein said surface treatment coating layer contains at least 10 mg/m 2  of zirconium element or titanium element, and a mass ratio of at least one selected from the group consisting zirconium element and titanium element with respect to nitrogen element according to XPS analysis of said surface treatment coating layer is from 0.05 to 500. 
     
     
         26 . The metal material according to  claim 24  having a surface treatment coating layer on a zinc-based metal material surface, wherein
 said surface treatment coating layer contains at least 10 mg/m 2  of at least one selected from the group consisting zirconium element and titanium element, and a mass ratio of at least one selected from the group consisting zirconium element and titanium element with respect to nitrogen element according to XPS analysis of said surface treatment coating layer is from 0.05 to 500. 
 
     
     
         27 . The metal material according to  claim 24  having a surface treatment coating layer on an aluminum-based metal material surface, wherein
 said surface treatment coating layer contains at least 5 mg/m 2  of at least one selected from the group consisting zirconium element and titanium element, and a mass ratio of at least one selected from the group consisting the zirconium element and titanium element with respect to nitrogen according to XPS analysis of said surface treatment coating layer is from 0.05 to 500. 
 
     
     
         28 . The metal material according to  claim 24  having a surface treatment coating layer on a magnesium metal material surface, wherein
 said surface treatment coating layer contains at least 5 mg/m 2  of at least one selected from the group consisting zirconium element and titanium element, 
 and a mass ratio of at least selected from the group consisting the zirconium element and titanium, element with respect to nitrogen according to XPS analysis of said surface treatment coating layer is from 0.05 to 500. 
 
     
     
         29 . A metal surface treatment method for treating the surface of a metal material, comprising:
 a treatment solution contact step of contacting with said metal material, a metal surface treatment solution containing   at least one selected from the group consisting a zirconium compound and titanium compound, and   a polyamine compound having a number average molecular weight from 150 to 500,000, wherein   said polyamine compound is a product produced by interaction of at least one selected from the group consisting a primary and secondary amino group-containing compound, and an amine activity reducing compound B containing at least one functional group B which interacts with at least one selected from the group consisting said primary and secondary amino group and reduces amine activity,   a content of at least one selected from the group consisting said zirconium compound and titanium compound in said metal surface treatment composition is from 10 ppm to 10,000 ppm with respect to the metal element,   a mass ratio of at least one selected from the group consisting zirconium element and titanium element included in at least one selected from the group consisting said zirconium compound and titanium compound is from 0.1 to 100, with respect to said polyamine compound, and   said polyamine compound is a compound having at least one siloxane unit; and   a water washing step of washing with water the metal material after said treatment solution contact step.   
     
     
         30 . The metal surface treatment method according to  claim 29 , wherein the metal material is simultaneously subjected to degreasing treatment in the treatment solution contact step. 
     
     
         31 . The metal surface treatment method according to  claim 29 , wherein the metal material is electrolyzed as a cathode in the treatment solution contact step. 
     
     
         32 . The metal surface treatment method according to  claim 29 , comprising an acid contact step of contacting the metal material after the water washing step with an acidic aqueous solution containing at least one selected from the group consisting of cobalt, nickel, tin, copper, titanium, and zirconium. 
     
     
         33 . The metal surface treatment method according to  claim 29 , comprising a polymer-containing solution contact step of contacting the metal material after the water washing step with a polymer-containing solution containing at least one of a water-soluble polymer compound and a water-dispersible polymer compound. 
     
     
         34 . A metal material treated by a metal surface treatment method according to  claim 29 . 
     
     
         35 . The metal material according to  claim 34 , having a surface treatment coating layer on an iron-based metal material surface, wherein said surface treatment coating layer contains at least 10 mg/m 2  of zirconium element or titanium element, and a mass ratio of at least one selected from the group consisting zirconium element and titanium element with respect to nitrogen element according to XPS analysis of said surface treatment coating layer is from 0.05 to 500. 
     
     
         36 . The metal material according to  claim 34  having a surface treatment coating layer on a zinc-based metal material surface, wherein
 said surface treatment coating layer contains at least 10 mg/m 2  of at least one selected from the group consisting zirconium element and titanium element, and a mass ratio of at least one selected from the group consisting zirconium element and titanium element with respect to nitrogen element according to XPS analysis of said surface treatment coating layer is from 0.05 to 500. 
 
     
     
         37 . The metal material according to  claim 34  having a surface treatment coating layer on an aluminum-based metal material surface, wherein
 said surface treatment coating layer contains at least 5 mg/m 2  of at least one selected from the group consisting zirconium element and titanium element, and a mass ratio of at least one selected from the group consisting the zirconium element and titanium element with respect to nitrogen according to XPS analysis of said surface treatment coating layer is from 0.05 to 500. 
 
     
     
         38 . The metal material according to  claim 34  having a surface treatment coating layer on a magnesium metal material surface, wherein
 said surface treatment coating layer contains at least 5 mg/m 2  of at least one selected from the group consisting zirconium element and titanium element, 
 and a mass ratio of at least selected from the group consisting the zirconium element and titanium element with respect to nitrogen according to XPS analysis of said surface treatment coating layer is from 0.05 to 500. 
 
     
     
         39 . The metal surface treatment method according to  claim 29 , wherein the polyamine compound having a number average molecular eight from 5,000 to 500,000. 
     
     
         40 . The metal surface treatment method according to  claim 29 , wherein the polyamine compound is a polyaminosiloxane. 
     
     
         41 . The metal surface treatment method according to  claim 40 , wherein the polyaminosiloxane is selected from at least one of N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-triethoxysilyl-N-(1,3-dimethyl-butylidene)propylamine, N-phenyl-3-aminopropyltrimethoxysilane and hydrochlorides of N-(vinylbenzyl)-2-aminoethyl-3-aminopropyltrimethoxysilane. 
     
     
         42 . The metal surface treatment method according to  claim 29 , wherein said polyamine compound contains from 0.1 mmol to 17 mmol of at least one selected from the group consisting primary and secondary amino group per 1 g of solid content.