Surface conditioning composition, method for producing the same, and surface conditioning method

Abstract

A surface conditioning composition for use in surface conditioning of a metal prior to being subjected to a phosphate-based chemical conversion treatment, in which the surface conditioning composition has a pH of 3 to 12, and includes at least one kind of zinc compound particles selected from the group consisting of zinc oxide particles, zinc hydroxide particles, and basic zinc carbonate particles; phosphoric acid and/or condensed phosphoric acid; and an amine compound having a specific structure and in which the zinc compound particles are dispersed and stabilized by the phosphoric acid and/or condensed phosphoric acid, and the amine compound.

1 - 13 . (canceled) 
   
   
       14 . A surface conditioning composition for use in surface conditioning of a metal prior to being subjected to a phosphate-based chemical conversion treatment, in which the surface conditioning composition has a pH of 3 to 12 and comprising:
 at least one kind of zinc compound particles selected from a group consisting of zinc oxide particles, zinc hydroxide particles, and basic zinc carbonate particles;   at least one of phosphoric acid or condensed phosphoric acid; and   an amine compound represented by the following general formula (1), wherein   the zinc compound particles are dispersed and stabilized by the phosphoric acid and/or condensed phosphoric acid, and the amine compound:   
     
       
         
         
             
             
         
       
       wherein R 1 , R 2 , and R 3  each independently represent a hydrogen atom, a straight or branched alkyl group having 1 to 10 carbon atoms, or a straight or branched alkyl group having 1 to 10 carbon atoms and having a hydrophilic functional group in the skeleton thereof, but R 1 , R 2 , and R 3  are not all a hydrogen atom. 
     
   
   
       15 . The surface conditioning composition according to  claim 14 , wherein
 the zinc compound particles are dispersed and stabilized by a dispersion means in an aqueous solution containing the phosphoric acid or condensed phosphoric acid, and the amine compound, and has a pH of 7 to 13.   
   
   
       16 . The surface conditioning composition according to  claim 14 , wherein the condensed phosphoric acid is pyrophosphoric acid. 
   
   
       17 . The surface conditioning composition according to  claim 14 , wherein the zinc compound particles have an average particle diameter of 0.05 μm to 3 μm. 
   
   
       18 . The surface conditioning composition according to  claim 14 , wherein the hydrophilic functional group is a hydroxyl group. 
   
   
       19 . The surface conditioning composition according to  claim 14 , wherein the amine compound is a tertiary alkanol amine. 
   
   
       20 . The surface conditioning composition according to  claim 14 , further comprising at least one selected from a group consisting of an aromatic organic acid, a phenolic compound, and a phenolic resin. 
   
   
       21 . The surface conditioning composition according to  claim 14 , further comprising at least one selected from a group consisting of a clay compound, fine particles of an oxide, and a water soluble thickening agent. 
   
   
       22 . The surface conditioning composition according to  claim 14 , further comprising at least one selected from a group consisting of a water soluble carboxyl group-containing resin, a saccharide, and a phosphonic acid compound. 
   
   
       23 . The surface conditioning composition according to  claim 14 , further comprising at least one of chelating agent or a surfactant. 
   
   
       24 . The surface conditioning composition according to  claim 14 , further comprising at least one of a zirconium complex ion or an oxidized metal ion. 
   
   
       25 . A comprising bringing a surface conditioning composition according to  claim 14  into contact with the surface of the metal. 
   
   
       26 . A method comprising producing a surface conditioning composition for use in the surface conditioning of a metal prior to being subjected to a phosphate-based chemical conversion treatment by allowing at least one kind of zinc compound particle selected from the group consisting of zinc oxide particles, zinc hydroxide particles, and basic zinc carbonate particles to be dispersed and stabilized by a dispersion means in an aqueous solution having a pH of 7 to 13 and containing at least one of phosphoric acid or condensed phosphoric acid, and an amine compound represented by the following formula (1): 
     
       
         
         
             
             
         
       
       wherein R 1 , R 2 , and R 3  each independently represent a hydrogen atom, a straight or branched alkyl group having 1 to 10 carbon atoms, or a straight or branched alkyl group having 1 to 10 carbon atoms and having a hydrophilic functional group in the skeleton thereof, wherein not each of R 1 , R 2 , and R 3  are hydrogen.