aluminum ruined by dishwasher detergent

earthieFebruary 5, 2012

Apparently, the formulation has been changed recently on the Cascade gel pacs (with the Dawn detergent added) to remove phosphates.

That's nice and all, but now, aluminum stuff becomes discolored---dull, dark, and blotchy.

Is there anyway to restore it back to shiny aluminum color?

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I don't beleive so.

I found this information on the Seventh Generation website:

"In general, dishwashers are not a safe environment for anodized aluminum cookware. The reason for this is both the nature of automatic dishwasher detergents and the nature of the automatic dishwasher process.

Aluminum is a very reactive metal, and the surface is rendered less active by the process of anodization. However, automatic dishwasher detergents are caustic and will attack the aluminum.

But the dishwasher environment itself is hazardous to aluminum! Many consumers improperly mix different types of metals in their automatic dishwasher. They may have silver, stainless steel, and aluminum present in a single wash. Mixing different metals in water creates a battery. One metal dissolves another while generating a flow of electrons! Unfortunately, aluminum is usually the metal that gets dissolved, resulting in pitting and discoloration of the aluminum cookware."

You can also read what Consumer Reports says about discolored aluminum at the link attached.

Here is a link that might be useful: Dishwasher detergents: New tests find a glitch

    Bookmark   February 5, 2012 at 7:22PM
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I know not to put stainless and silver in together, but I've never had trouble with aluminum before now.

That's pretty cool, though that different metals create a battery.

    Bookmark   February 5, 2012 at 7:43PM
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I bought an ancient aluminum colander from the flea market, wanted to sterilize it and put it in super hot water and dish liquid sitting in the sink and it turned all nasty looking? I have no idea was just dish liquid.

    Bookmark   February 8, 2012 at 10:33AM
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