When I put an aluminum pan in a water bath, it created a dark gray stain. Any way to avoid that?

Terely Harrell
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6 Comments

Emmie April 23, 2018
It looks like it's oxidizing. If they're disposable pans, nothing to worry about; it won't harm the food and you can toss them safter. If you're looking for something reusable, find something in stainless steel.
 
Terely H. April 23, 2018
Hi Emmie. Thank you for your response!
Here’s the situation- I made a flan in that aluminum pan for a gift. It’s ugly after oxidyzing in the water bath. I want to prevent this from happening again. I thought about adding an acid like lemon or lime juice to the water next time. I also thought about using white vinegar but the smell might be awful? Any thoughts on adding something to the water bath next time to avoid or minimize oxydation?
 
Emmie April 23, 2018
Trying to remember intro chem--I'm not sure if an acid would help but it's worth a try!
 
Nancy April 23, 2018
@Terely Harrell...not a direct answer, but I've had better
& consistent success using ceramic dishes when making quiches or flans as gifts. Pretty and good textured, good tasting results.
 
Liz D. April 23, 2018
You could probably find a glass/ceramic pan at a thrift store for not much money & use that--non-reactive and no need to get it back from the giftee...
 
HalfPint April 23, 2018
@Terely Harrell, oxidation worsens in with acidic foods so I would not be adding more acid to the water. Aluminum is reactive to air and water, so your best bet is using stainless steel or seasoning the pan to block oxygen and water.
 
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