Patent ID: 8596216

Claim:
A method for the production of a water-reactive Al film comprising the steps of: melting a material which comprises 4NAl or 5NAl as an Al raw material and added In in an amount ranging from 2 to 5% by mass on the basis of the mass of the Al raw material in such a manner that the composition of the material becomes uniform; thermally spraying the resulting molten material on the surface of a base material according to the electric arc spraying technique; and solidifying the sprayed molten material through quenching to thus form the water-reactive Al film in which In is uniformly dispersed in Al crystalline grains, wherein even after the water-reactive Al film is subjected to an influence of a thermal hysteresis within a film forming chamber of a film forming apparatus in which an upper limit of a thermal hysteresis temperature is of an order of 300 to 350oC, reaction current density, as determined by immersing the base material covered with the water-reactive Al film in warm water maintained at a temperature ranging from 40 to 130oC, is not less than 50 mA/cm2.