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  Self-healing metal oxides
 
  Researchers find an ultrathin layer of aluminum oxide, though solid, can flow like a liquid instead of cracking.

Most metals, with the notable exception of gold, tend to oxidize when exposed to air and water. This reaction, which produces rust on iron, tarnish on silver, and verdigris on copper or brass, can weaken the metal over time and lead to cracks or structural failure. But there are three known elements that produce an oxide that can actually serve as a protective barrier to prevent any further oxidation: aluminum oxide, chromium oxide, and silicon dioxide.

For more, check out this MIT story.

 
      Posted by: Agitator!!, April 9, 2018, 11:56 am  

 
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