Surface-Treated Steel Sheet, Organic Resin Coated Metal Container, and Method for Producing Surface-Treated Steel Sheet

Abstract

Provided is a surface-treated steel sheet with a compound layer containing F and composed essentially or Zr at least on one surface thereof, wherein the Zr amount is 80 to 350 mg/m 2 and the F amount is 0.5 to 10 mg/m 2 within the layer, and an organic resin coated metal container manufactured using the surface-treated steel sheet. The surface-treated steel sheet of the present invention is manufactured through forming a layer having the Zr amount of 80 to 350 mg/m 2 at least on one surface of a steel sheet by cathode electrolytic treatment in an aqueous solution containing a Zr ion and F ion, and subsequently adjusting the surface to control the F amount to 0.5 to 10 mg/m 2 by one or more treatments selected from immersion and spraying with an ion-containing aqueous solution and cathode electrolytic treatment in the ion-containing aqueous solution.

1 . A surface-treated steel sheet comprising a compound layer containing F and composed essentially of Zr at least on one surface of a steel sheet, wherein a Zr amount is 80 to 350 mg/m 2  and a F amount is 0.5 to 10 mg/m 2  within the layer. 
     
     
         2 . An organic resin coated metal container manufactured using a surface-treated steel sheet according to  claim 1 . 
     
     
         3 . A method for producing a surface-treated steel sheet having a compound layer containing F and composed essentially of Zr at least on one surface of a steel sheet, the method comprising:
 forming a layer where a Zr amount within the layer is 80 to 350 mg/m 2  by performing a cathode electrolytic treatment to the steel sheet in an aqueous solution containing a Zr ion and F ion; and   adjusting a surface to control the F amount within the layer to 0.5 to 10 mg/m 2  by performing any one or more treatments selected from immersion to an ion-containing aqueous solution, spraying of the ion-containing aqueous solution, and cathode electrolytic treatment in the ion-containing aqueous solution.   
     
     
         4 . The method for producing a surface-treated steel sheet according to  claim 3 , wherein the ion-containing aqueous solution in adjusting the surface is an alkaline aqueous solution containing one or more types of ions selected from a sodium ion, ammonium ion, and potassium ion. 
     
     
         5 . The method for producing a surface-treated steel sheet according to  claim 3 , wherein a pH of the ion-containing aqueous solution in adjusting the surface is 9 or more. 
     
     
         6 . A method for producing a surface-treated steel sheet for forming a compound layer containing F and composed essentially of Zr at least on one surface of a steel sheet, the method comprising:
 forming a layer where a Zr amount within the layer is 80 to 350 mg/m 2  by performing a cathode electrolytic treatment to the steel sheet in an aqueous solution containing a Zr ion and F ion; and   adjusting the surface to control a F amount within the layer to 0.5 to 10 mg/m 2  by performing spraying and/or immersion with water of 90° C. or more to the steel sheet.