Where is argon most commonly used on Earth?
Quick Answer
Argon is used widely on Earth as a shielding gas in welding and in some light bulbs and insulated windows. It is obtained mainly from the atmosphere by air separation.
The Full Story
Argon is the third most abundant gas in Earth’s atmosphere, making up about 0.93 percent of the air by volume. Because it is chemically inert, it is widely used to protect hot metals from reacting with oxygen during welding and metal fabrication. Argon is also used in some incandescent and fluorescent lighting, as well as in double- and triple-pane windows for insulation. It is produced industrially by separating liquid air in large cryogenic plants. Its abundance and inertness make it one of the most useful noble gases.
Key Facts
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"The gas that protects welds is all around you in the air."
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