zxcvbob wrote:
>
> Kalmia wrote:
> > Is it the d/w 'soap'?
> >
>
> Yes, the sodium carbonate will etch the aluminum. (so will oven
> cleaner) I think it will actually take the anodized finish off, but it
> might take a couple of trips thru the DW to do that much damage.
>
> Bob

Yes, over time it will strip off the anodizing. Sodium Hydroxide (Lye)
is used to strip anodizing, and the DW detergent while not as strong as
Lye will have the same effect over time.

That said the pans will still be useable, but they will have an ugly
mottled finish and not have the stick-resistant properties that the
anodizing had, they will just be basic aluminum cookware.