Pyrophoric materials and methods for making the same

摘要

A pyrophoric coating formed by leaching aluminum from an aluminide coated web in which the aluminide coating was formed on or into the web by an exothermic and diffusion reaction of a powder containing aluminum and chromium with or without a transition metal selected from the group consisting of iron, nickel or cobalt and in which the weight ratio of chromium to aluminum is at least 1:50 but no more than about 1:4.