Chemical treatment steel sheet and method for manufacturing chemical treatment steel sheet

Abstract

A chemical treatment steel sheet contains: a steel sheet; a plated layer containing Ni and formed on at least one surface of the steel sheet; a chemical treatment layer containing a Zr compound in which an amount of Zr contained therein is 1.0 to 150 mg/m2, a phosphate compound in which an amount of P contained therein is 1.0 to 100 mg/m2, and an Al compound in which an amount of Al contained therein is 0.10 to 30.0 mg/m2. The plated layer is a Ni-plated layer containing Ni in which an amount of Ni contained therein is 5.0 to 3000 mg/m2 or a composite plated layer containing Ni in which an amount of Ni contained therein is 2.0 to 200 mg/m2 and Sn in which an amount of Sn contained therein is 0.10 to 10.0 g/m2 and having an island-shaped Sn-plated layer formed on a Fe—Ni—Sn alloy layer.

1 . A chemical treatment steel sheet comprising:
 a steel sheet;   a plated layer which contains Ni and is formed on at least one surface of the steel sheet;   a chemical treatment layer which is formed on the plated layer and contains a Zr compound in which an amount of Zr contained therein is 1.0 to 150 mg/m 2 , a phosphate compound in which an amount of P contained therein is 1.0 to 100 mg/m 2 , and an Al compound in which an amount of Al contained therein is 0.10 to 30.0 mg/m 2 ,   wherein the plated layer is:
 a Ni-plated layer which contains Ni in which an amount of Ni contained therein is 5.0 to 3000 mg/m 2 ; or 
 a composite plated layer which contains Ni in which an amount of Ni contained therein is 2.0 to 200 mg/m 2  and Sn in which an amount of Sn contained therein is 0.10 to 10.0 g/m 2  and has an island-shaped Sn-plated layer formed on a Fe—Ni—Sn alloy layer. 
   
     
     
         2 . The chemical treatment steel sheet according to  claim 1 , wherein the chemical treatment layer contains Al 2 O 3  in which an amount of Al contained therein is 0.10 to 30.0 mg/m 2 . 
     
     
         3 . The chemical treatment steel sheet according to  claim 1 , wherein the chemical treatment layer contains:
 the Zr compound in which an amount of Zr contained therein 1.0 to 120 mg/m 2 ;   the phosphate compound in which an amount of P contained therein is 2.0 to 70.0 mg/m 2 ; and   the Al compound in which an amount of Al contained therein is 0.20 to 20.0 mg/m 2 .   
     
     
         4 . The chemical treatment steel sheet according to  claim 1 , wherein the Ni-plated layer contains Ni in which an amount of Ni contained therein is 10.0 to 2000 mg/m 2 . 
     
     
         5 . The chemical treatment steel sheet according to  claim 1 , wherein the composite plated layer contains:
 Ni in which an amount of Ni contained therein is 5.0 to 100 mg/m 2 ; and   Sn in which an amount of Sn contained therein is 0.30 to 7.0 g/m 2 .   
     
     
         6 . The chemical treatment steel sheet according to  claim 1 , wherein a surface of the chemical treatment layer is not covered with a film or a coating material. 
     
     
         7 . A method for manufacturing a chemical treatment steel sheet, the method comprising:
 a plating process of forming a Ni-plated layer or a composite plated layer on a surface of a steel sheet,   an electrolytic treatment process of forming a chemical treatment layer on the Ni-plated layer or the composite plated layer by performing an electrolytic treatment under the conditions of a current density of 1.0 to 100 A/dm 2  and an electrolytic treatment time of 0.20 to 150 seconds using a chemical treatment solution having a temperature of 5° C. or higher and lower than 90° C.,   wherein the Ni Plated layer contains Ni in which an amount of Ni contained therein is 5.0 to 3000 mg/m 2 ,   the composite plated layer contains Ni in which an amount of Ni contained therein is 2.0 to 200 mg/m 2  and Sn in which an amount of Sn contained therein is 0.10 to 10.0 g/m 2  and has an island-shaped Sn-plated layer is formed on a Fe—Ni—Sn alloy layer, and   the chemical treatment solution contains 10 to 20000 ppm of Zr ions, 10 to 20000 ppm of F ions, 10 to 3000 ppm of phosphate ions, a total amount of 100 to 30000 ppm of nitrate ions and sulfate ions, and 500 to 5000 ppm of Al ions, in which a supply source of the Al ions is (NH 4 ) 3 AlF 6 .   
     
     
         8 . The method for manufacturing a chemical treatment steel sheet according to  claim 7 , wherein the chemical treatment solution contains:
 200 to 17000 ppm of the Zr ions;   200 to 17000 ppm of the F ions;   100 to 2000 ppm of the phosphate ions;   the total amount of 1000 to 23000 ppm of the nitrate ions and the sulfate ions; and   500 to 3000 ppm of the Al ions.