Accession Number : AD0488572

Title :   REACTIVITY OF TITANIUM WITH SELECTED HALOGENATED HYDROCARBONS USED AS FIRE EXTINGUISHING AGENTS.

Descriptive Note : Technical rept. 1 Jun 65-31 May 66,

Corporate Author : BUREAU OF MINES BRUCETON PA EXPLOSIVES RESEARCH CENTER

Personal Author(s) : Kuchta, J. M. ; Martindill, G. H. ; Spolan, I.

Report Date : JUN 1966

Pagination or Media Count : 15

Abstract : The use of some halogenated hydrocarbons as fire extinguishing agents is greatly limited because of their ability to form flammable fuel vapor-air mixtures or highly reactive decomposition products at elevated temperatures. The present work was conducted to determine the extent of reaction which may occur between heated titanium metal and the vapors of 5 halogenated hydrocarbon extinguishing agents in air or without air at various temperatures. Titanium specimens of sponge, foil, wire, and turnings of various dimensions were used in autoignition and wire ignition type experiments. Burning of the heated specimens could be promoted by the addition of the extinguishing agents depending particularly upon the specimen temperature, size, and type of surface. Little reaction was noted with titanium foil, wire, and turnings greater than 0.02-inch thickness at temperatures as high as about 2500 F under simulated hydrocarbon fire conditions. Bromochloromethane was generally the least reactive with titanium, and dibromodifluoromethane and 1,2,2-trifluoro -pentachloropropane were the most reactive of the extinguishing agents examined. (Author)

Descriptors :   (*FIRE EXTINGUISHERS, HALOGENATED HYDROCARBONS), (*HALOGENATED HYDROCARBONS, FLAMMABILITY), MIXTURES, VAPORS, AIR, DECOMPOSITION, TITANIUM, COMBUSTION, TEMPERATURE, SURFACES, THICKNESS, BROMINE COMPOUNDS, CHLORINE COMPOUNDS, FLUORINE COMPOUNDS, METHANE, PROPANE.

Subject Categories : Safety Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE