They all seem to be ceramic-coated. So. When will you admit that hard-anodized is porus, requires a coating, and the coating can still be teflon? "Hard Anodized" is a useless keyword.
Correct, hard anodized does not equal Teflon. But point me to a link selling just a hard anodized pan. If you search "hard anodized cookware" the top links are all hard anodized + teflon ("nonstick"). Tfal, Calphalon, Cuisinart...
Can you give me an example? Calphalon for instance have "hard-anodized nonstick" but they're still teflon. Anodizing is actually how teflon is usually made - the anodizing makes a porous surface that the teflon can stick to. So you'right that the sealer is different, it's just teflon.
The barrier to acids comes from oxidizing the surface, which anodizing does. But pores do not exist in bare aluminum, and hard anodize actually has the biggest pores! There is technically a sealer on the surface, but sticking it in hot water can sometimes release it, depending on what sealer was used. Here's an article with more info: https://www.lightmetalage.com/news/industry-news/surface-finishing/introduction-to-anodizing-aluminum/
The GPS chips have internal limits on how fast they think they can move. If they determine that they are moving faster than 300m/s they will stop outputting any results for a period of time. This limit is, IIRC, put in at the silicon level, so only military chips can bypass it.
If you try to use mapping apps on a plane you sometimes run into this issue.
Anodized aluminum is porous, that's how the dye stays attached. Also aluminum is not recommended for use with acidic foods. I would personally avoid it.
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