| 摘要 |
<p>PURPOSE:To prevent generation of cracks in films in DI forming and to obtain steel sheets having excellent corrosion resistance and lubricity after manufacturing cans by forming a film and a lubricating film consisting of a chromate or Ni and polyester on steel surfaces being to be the inner and outer surfaces of a can body, respectively. CONSTITUTION:A chromate film 2 consisting of a metallic chrome layer and a chrome oxide bydrate layer on the metallic chrome layer surface is formed on the surface of a steel sheet 1 being to be the inner surface of a can body, then a polyester film 3 is formed on the film 2 surface. A tin plating film 4 is formed on the other surface of the sheet 1 being to be the outer surface of the can body. By manufacturing DI cans with the sheet 1, no crack in the film on the inner surface of the can is generated, an excellent lubricity is given, spray coating and baking of a thermosetting paint onto the inner surface after manufacturing cans is not required, and excellent corrosion resistances of both the inner and outer surfaces are obtained.</p> |
