Composite plated film and laminated film

Abstract

It is provided a steel with composite plating film providing rust prevention over a long time period and a method of manufacturing thereof. A composite plating film 24 is formed on a metal material 21 . The film 24 has a plating film 23 made of a sacrificial anode metal and photocatalyst particles 22 dispersed and fixed in the plating film 23 . The photocatalyst particle has a main body composed of a photocatalyst and a semiconductor material supported thereon. The composite plating film 24 is formed on the surface of the metal material 21 by electroplating, hot-dipping, chemical plating or the like.

1 . A corrosion prevention film for a metal for use in the dark, wherein said film is formed from raw materials comprising a sacrificial anode metal and semiconductor oxide fine particles. 
     
     
         2 . The corrosion prevention film for a metal of  claim 1 , wherein said corrosion prevention film is formed by applying a corrosion prevention paint comprising said sacrificial anode metal and said semiconductor oxide fine particles. 
     
     
         3 . The corrosion prevention film for a metal of  claim 1 , comprising a corrosion prevention plating film formed by a plating solution comprising said semiconductor oxide fine particles and at least one of said sacrificial anode metal and a compound of said sacrificial anode metal. 
     
     
         4 . A composite film comprising said corrosion prevention film of  claim 1  and a upper film formed on said corrosion prevention film. 
     
     
         5 . The composite film of  claim 4 , wherein said upper film comprises an inorganic porous film. 
     
     
         6 . The composite film of  claim 4 , wherein said upper film comprises a light shielding film.