Electroplating solution composition for organic polymer-zinc alloy composite plating and plated metal material using such composition

Abstract

An object of the invention is to provide an electroplating solution composition capable of obtaining a plated film excellent in adhesiveness to a coated film and excellent in corrosion resistance without surface treatment. The present invention relates to an organic polymer composite zinc alloy electroplating solution composition containing: (A) 1 to 600 g/l of Zn ion, (B) 1 to 600 g/l of an iron-group-element ion, and (C) 0.1 to 200 g/l, in terms of W ion, of tungstic acid-based compound, and (D) 0.5 to 500 g/l of water-soluble or water-dispersible organic polymer compound having a number average molecular weight of 1,000 to 1,000,000.

1 . An organic polymer composite zinc alloy electroplating solution composition containing: 
 (A) 1 to 600 g/l of Zn ion,    (B) 1 to 600 g/l of an iron-group-element ion,    (C) 0.1 to 200 g/l, in terms of W ion, of tungstic acid-based compound, and    (D) 0.5 to 500 g/l of water-soluble or water-dispersible organic polymer compound having a number average molecular weight of 1,000 to 1,000,000.    
   
   
       2 . The organic polymer composite zinc alloy electroplating solution composition according to  claim 1 , wherein the iron-group-element ion (B) is Fe ion.  
   
   
       3 . The organic polymer composite zinc alloy electroplating solution composition according to  claim 1 , wherein the tungstic acid-based compound (C) is at least one compound selected from the group consisting of tungstic acid, tungstate salts, phosphotungustic acid, and phosphotungstate salts.  
   
   
       4 . The organic polymer composite zinc alloy electroplating solution composition according to any one of claims  1 , wherein the organic polymer compound (D) has at least one hydrophilic group selected from the group consisting of nonionic hydrophilic groups, anionic hydrophilic groups, and cationic hydrophilic groups.  
   
   
       5 . The organic polymer composite zinc alloy electroplating solution composition according to any one of claims  1 , wherein the organic polymer compound (D) has at least one hydrophilic group selected from the group consisting of a hydroxyl group, a sulfonic acid group, a phosphoric acid group, a carboxyl group, an amino group, and an ammonium group.  
   
   
       6 . The organic polymer composite zinc alloy electroplating solution composition according to any one of claims  1 , which further contains 5 to 300 g/l of a corrosion-inhibiting pigment and/or ceramic particles.  
   
   
       7 . The organic polymer composite zinc alloy electroplating solution composition according to  claim 6 , wherein the corrosion-inhibiting pigment is at least one selected from the group consisting of phosphate salts, molybdate salts, metaborate salts, and silicate salts.  
   
   
       8 . The organic polymer composite zinc alloy electroplating solution composition according to  claim 6 , wherein the ceramic particles are particles of at least one selected from the group consisting of Al 2 O 3 , SiO 2 , TiO 2 , ZrO 2 , Y 2 O 2 , ThO 2 , CeO 2 , Fe 2 O 3 , B 4 C, SiC, WC, ZrC, TiC, graphite, graphite fluoride, BN, Si 3 N 4 , TiN, Cr 3 B 2 , ZrB 2 , 2MgO.SiO 2 , MgO.SiO 2 , and ZrO 2 .SiO 2 .  
   
   
       9 . The organic polymer composite zinc alloy electroplating solution composition according to any one of claims  1 , which further contains 0.01 to 10 g/l of at least one organic compound selected from the group consisting of alkynes, alkynols, amines or salts thereof, thio compounds, aromatic carboxylic acid compounds or salts thereof, and heterocyclic compounds.  
   
   
       10 . An organic polymer composite zinc alloy electroplated metal material, which is obtainable by electroplating a metal raw material using the organic polymer composite zinc alloy electroplating solution composition according to  
   
   
       11 . The organic polymer composite zinc alloy electroplated metal material according to  claim 10 , which is obtained by bringing the film formed by the electroplating into contact with an acidic aqueous solution of a compound containing at least one element selected from the group consisting of cobalt, nickel, titanium, and zirconium.  
   
   
       12 . A fingerprint-resistant steel plate wherein an organic resin film is directly formed on the organic polymer composite zinc alloy electroplated metal material according to  claim 10  without surface treatment.  
   
   
       13 . A lubricating steel plate wherein an organic resin film is directly formed on the organic polymer composite zinc alloy electroplated metal material according to  claim 10  without surface treatment.