Leadership

Fire and Explosion in METALS Part II

Issue 6 and Volume 112.

Fire and Explosion in METALS Part II THE PREVIOUS installment concerned the characteristics and hazards of the alkali metals, as well as uranium and plutonium. This concluding article will deal with metal powders which are widely employed as well as metal hydrides. The extinguishing action of Trimethoxyboroxine (TMB), which is effective on certain metal fires, is also explained. Metal powders—zirconium As with all other substances, metals become more easily ignited as particle size decreases. When metals are reduced to powders, as they are for use in paints, printing inks, dyeing and powder metallurgy, they assume their most dangerous characteristics. Zirconium, magnesium and its alloys, aluminum and titanium powders present the greatest hazards. Reduced and carbonyl iron, manganese, zinc, silicon, tin and antimony are less dangerous. Cadmium, copper, chromium, lead and milled iron powders, while still to be reckoned with, present a low order of flammability and explosibility. Zirconium powder is…

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