Organic Coatings to Improve the Storageability and Safety of Pyrotechnic Compositions

摘要

A study was conducted to find organic coating which could be used to coat magnesium and aluminum powders used in pyrotechnic compositions. This coating material would greatly reduce, and possibly eliminate, the reaction of these finely divided and highly reactive metals with water vapor under storage conditions to produce hydrogen gas. Production of hydrogen gas in systems having minimal free volume can rupture cases and seals and also produce highly explosive atmospheres in storage magazines and warehouses. This reaction degrades the metal surfaces resulting in possible reduction in reactivity so essential in many flare applications. A second advantage of coating would be to reduce the sensitivities of the pyro compositions by introducing a somewhat unreactive medium (coating) between the metals and inorganic oxidants.