Aqueous composition, and manufacturing method and thinning processing method for stainless steel using same

Abstract

The present invention addresses the problem of providing: an aqueous composition which enables the manufacturing of thinned stainless steel; such stainless steel and a manufacturing method therefor; and a thinning processing method for stainless steel. The problem has been solved by using an aqueous composition for thinning stainless steel, the aqueous composition containing 0.01-10 mass % of hydrogen peroxide, 12.5-40 mass % of halide ions, and 0-3.0 mass % of copper ions. According to the present invention, the thinning of stainless steel can be achieved by a simple method.

1 : An aqueous composition for thinning stainless steel, the aqueous composition comprising 0.01% to 10% by mass of hydrogen peroxide, 12.5% to 40% by mass of halide ions, and 0% to 3.0% by mass of copper ions. 
     
     
         2 : The aqueous composition according to  claim 1 , comprising 0.1% to 5% by mass of hydrogen peroxide, 15% to 30% by mass of the halide ions, and 0% to 1.0% by mass of the copper ions. 
     
     
         3 : A method for manufacturing stainless steel, the method comprising
 performing a thinning treatment by thinning the stainless steel with the aqueous composition according to  claim 1 .   
     
     
         4 : The method according to  claim 3 , wherein a surface of the stainless steel after the thinning treatment has a mean roughness (Ra) of 0.35 μm or less and a maximum height (Rz) of 2.5 μm or less. 
     
     
         5 : The method according to  claim 3 , wherein a density of the stainless steel after the thinning treatment is 4.5 g/cm 3  or more. 
     
     
         6 : The method according to  claim 3 , wherein a density (g/cm 3 ) of the stainless steel after the thinning treatment is 0.60-fold or more of a density (g/cm 3 ) of the stainless steel before the thinning treatment. 
     
     
         7 : The method according to  claim 3 , wherein a thickness of the stainless steel after the thinning treatment is 100 μm or less. 
     
     
         8 : The method according to  claim 3 , wherein a thickness (μm) of the stainless steel after the thinning treatment is 0.95-fold or less of a thickness (μm) of the stainless steel before the thinning treatment. 
     
     
         9 : A method for thinning stainless steel, the method comprising
 treating the stainless steel using the aqueous composition according to  claim 1 .