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Scrap gold, silver, platinum from an airplanes

Do yo know if commercial airplanes and U.S military airplanes give back to "graveyards" in the U.S. Southwest contain many thousands of dollars worth of gold, silver and platinum and are significant part of their scrap values....??

"Precious metals are used in airplanes, especially in engines, and when a plane is scrapped, the metals are recovered for their value and recycled," says Terry Hanlon, president of Dillon Gage Metals in Dallas. Gold is useful as a conductor and lubricator, he adds.

Up to 80% part of an airplane can be recycled, and precious metals can provide half of a plane's recycling value. When engines are scrapped or rebuilt, between $6,000 and $18,000 worth of precious metals can be recovered through leaching and radioactive processes. That's no small change considering that gold prices climbed this year, and lots of planes are scrapped in periods of economic weakness and when new models are built.

According to the U.S. Defense Logistics Agency, gold is used in aeronautical circuitry for relays, transistors, diodes and contact points, while silver is employed in electronic parts and welding and brazing wire. Platinum family metals are utilized in aircraft spark plugs and electronics.

Gold is a dependable conductor and connector in aeronautical circuitry. The yellow metal helps plane parts hold up well, reducing maintenance and repair costs. Thin films of it between moving parts serve as lubricants. Gold molecules pass one another under friction, creating lubricant action. The metal's malleability allows it to be processed into a thin film that can coat and protect moving parts.

And because of gold's reflective qualities, many airplane parts are fitted with gold-coated, polyester film to reflect infrared radiation and stabilize temperatures on board. Otherwise, those dark-looking parts of an aircraft would absorb a tremendous amount of heat. Gold is also used in space suits. A thin coating is applied to suits worn by astronauts to protect them from radiation and deflect burning sunlight.

Because gold is expensive, it's only used when cheaper substitutes won't do. But considering the number of lives at risk in air and space travel, and the billions of dollars spent on it, precious metals are worth it.