this post was submitted on 06 Sep 2023
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Explain Like I'm Five | Don't Panic!

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ELI5 why do shinny aluminum pie plates turn dull and dark grey in a dishwasher. (lemmit.online)
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The original was posted on /r/explainlikeimfive by /u/GoodGoodGoody on 2023-09-06 09:22:41.

Even on low heat. What exactly is the reaction?

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[–] DataCrime 1 points 2 years ago

It’s probably just oxidation, aluminum doesn’t really stay shiny on it’s own it has to be sealed to prevent it from being exposed to air. This isn’t really a bad thing as the outer layer of oxide is harder than the aluminum and offers a degree of protection.