Emulsion

Abstract

It is an object of the present invention to provide an emulsion which shows sufficient rust preventive effect, in spite of water it contains as a constituent of the composition, on a metallic material which is otherwise corroded when coming into contact with water and oxygen. The emulsion (emulsion fuel) 1 of the present invention comprises water 2 and oil (fuel oil) 3 emulsified by the aid of a surfactant 4, characterized in that it forms a passivation film 10 P on a metallic material 10 which may be otherwise corroded when coming into contact with water and oxygen, and also forms a water-repellant layer 4 R of the surfactant molecules 4 M on the passivation film 10 p.

What we is claimed is:  
     
         1 . An emulsion comprising water and oil emulsified by the aid of a surfactant, characterized in that it forms a passivation film on a metallic material which may be otherwise corroded when coming into contact with water and oxygen, and also forms a water-repellant layer of the surfactant molecules on said passivation film.  
     
     
         2 . The emulsion according to  claim 1 , wherein said oil to be mixed with said water is fuel oil as constituents of an emulsion fuel.  
     
     
         3 . The emulsion according to  claim 1 , wherein said surfactant is neutral and a base is incorporated to make said emulsion alkaline.  
     
     
         4 . The emulsion according to  claim 2 , wherein said surfactant is neutral and a base is incorporated to make said emulsion alkaline.  
     
     
         5 . The emulsion according to  claim 1 , wherein said surfactant is alkaline to make said emulsion alkaline.  
     
     
         6 . The emulsion according to  claim 2 , wherein said surfactant is alkaline to make said emulsion alkaline.