Safety Precautions For Magnesium Metal
Magnesium metal and its alloys are explosive hazards; they are highly flammable in their pure form when molten or in powder or ribbon form. Burning or molten magnesium metal reacts violently with water. When working with powdered magnesium, safety glasses with welding eye protection are employed, because the bright white light produced by burning magnesium contains ultraviolet light that can permanently damage the retinas of the eyes.
Magnesium is capable of reducing water to highly flammable hydrogen gas:
- Mg (s) + 2 H2O (l) → Mg(OH)2 (s) + H2 (g)
As a result, water cannot be used to extinguish magnesium fires; the hydrogen gas produced will only intensify the fire. Dry sand is an effective smothering agent but is usable only on relatively level and flat surfaces.
Magnesium also reacts with carbon dioxide to form magnesium oxide and carbon:
- 2 Mg (s) + CO2 → 2 MgO (s) + C (s)
hence, carbon dioxide fire extinguishers cannot be used for extinguishing magnesium fires either.
Burning magnesium is usually quenched by using a Class D dry chemical fire extinguisher, or by covering the fire with sand or magnesium foundry flux to remove its air source.
Read more about this topic: Magnesium
Famous quotes containing the words safety, precautions and/or metal:
“Man gives every reason for his conduct save one, every excuse for his crimes save one, every plea for his safety save one; and that one is his cowardice.”
—George Bernard Shaw (1856–1950)
“We must take precautions against being prematurely honed sharp—since at the same time we are being prematurely honed thin.”
—Friedrich Nietzsche (1844–1900)
“There were metal detectors on the staff-room doors and Hernandez usually had a drawer full of push-daggers, nunchuks, stun-guns, knucks, boot-knives, and whatever else the detectors had picked up. Like Friday morning at a South Miami high school.”
—William Gibson (b. 1948)