Aqueous composition, stainless steel surface roughening method using same, and method for manufacturing roughened stainless steel

Abstract

The problem of the present invention is to provide an aqueous composition with which the surface of stainless steel is sufficiently roughened in an efficient manner with few steps, while maintaining good quality (e.g., thickness) of the stainless steel after treatment. The above problem is solved by the following aqueous composition for roughening the surface of stainless steel. Namely, the aqueous composition comprises 0.1% to 10% by mass of hydrogen peroxide based on the total amount of the aqueous composition, 1% to 30% by mass of halide ions based on the total amount of the aqueous composition, and 0% to 3% by mass of copper ions based on the total amount of the aqueous composition.

1 - 4 . (canceled) 
     
     
         5 : A roughening treatment method for stainless steel, which comprises a roughening treatment step in which roughening treatment is performed on the surface of stainless steel using an aqueous composition which comprises:
 0.1% to 10% by mass of hydrogen peroxide based on the total amount of the aqueous composition;   1% to 30% by mass of halide ions based on the total amount of the aqueous composition; and   0% to 3% by mass of copper ions based on the total amount of the aqueous composition.   
     
     
         6 : The roughening treatment method for stainless steel according to  claim 5 , wherein regions of stainless steel on which the roughening treatment is performed have at least sites whose thickness is 15 μm or less. 
     
     
         7 : The roughening treatment method for stainless steel according to  claim 6 , wherein all the regions of stainless steel on which the roughening treatment is performed have a thickness of 15 μm or less. 
     
     
         8 : The roughening treatment method for stainless steel according to  claim 5 , wherein the stainless steel is a stainless steel foil. 
     
     
         9 : The roughening treatment method for stainless steel according to  claim 5 , wherein the maximum height (Rz) of the surface of roughened stainless steel as defined in JIS B 0601-2001 is 1.0 μm or more. 
     
     
         10 : The roughening treatment method for stainless steel according to  claim 5 , wherein the maximum height (Rz) of the surface of roughened stainless steel as defined in JIS B 0601-2001 is 5.0 μm or less. 
     
     
         11 : The roughening treatment method for stainless steel according to  claim 5 , wherein the maximum height (Rz) of the surface of roughened stainless steel as defined in JIS B 0601-2001 is 0.3 μm or more greater than the maximum height (Rz) of the surface of untreated stainless steel. 
     
     
         12 : The roughening treatment method for stainless steel according to  claim 5 , wherein the arithmetical mean roughness (Ra) of the surface of roughened stainless steel as defined in JIS B 0601-2001 is 0.1 μm or more. 
     
     
         13 : The roughening treatment method for stainless steel according to  claim 5 , wherein the arithmetical mean roughness (Ra) of the surface of roughened stainless steel as defined in JIS B 0601-2001 is 1.0 μm or less. 
     
     
         14 : The roughening treatment method for stainless steel according to  claim 5 , wherein the arithmetical mean roughness (Ra) of the surface of roughened stainless steel as defined in JIS B 0601-2001 is 0.04 μm or more greater than the arithmetical mean roughness (Ra) of the flat surface of untreated stainless steel. 
     
     
         15 : The roughening treatment method for stainless steel according to  claim 5 , wherein the stainless steel is at least any of the following defined in JIS G4305:
 chromium-nickel stainless steel including SUS304, SUS316, SUS321, SUS347, and SUS329J1;   ferrite stainless steel (chromium stainless steel) including SUS405, SUS430, SUS434, SUS444, SUS447, and SUSXM27; and   precipitation hardening stainless steel (chromium-nickel stainless steel) including SUS630, SUS631, and SUH660.   
     
     
         16 : A method for manufacturing roughened stainless steel, which comprises a roughening treatment step in which roughening treatment is performed on the surface of stainless steel using an aqueous composition which comprises:
 0.1% to 10% by mass of hydrogen peroxide based on the total amount of the aqueous composition;   1% to 30% by mass of halide ions based on the total amount of the aqueous composition; and   0% to 3% by mass of copper ions based on the total amount of the aqueous composition.   
     
     
         17 : The method for manufacturing roughened stainless steel according to  claim 16 , wherein the stainless steel is at least any of the following defined in JIS G4305:
 chromium-nickel stainless steel including SUS304, SUS316, SUS321, SUS347, and SUS329J1;   ferrite stainless steel (chromium stainless steel) including SUS405, SUS430, SUS434, SUS444, SUS447, and SUSXM27; and   precipitation hardening stainless steel (chromium-nickel stainless steel) including SUS630, SUS631, and SUH660.   
     
     
         18 : The method for manufacturing roughened stainless steel according to  claim 16 , wherein the stainless steel is a stainless steel foil. 
     
     
         19 : The method for manufacturing roughened stainless steel according to  claim 16 , wherein regions of stainless steel on which the roughening treatment is performed have at least sites whose thickness is 15 μm or less. 
     
     
         20 : The method for manufacturing roughened stainless steel according to  claim 19 , wherein all the regions of stainless steel on which the roughening treatment is performed have a thickness of 15 μm or less. 
     
     
         21 . (canceled)