Can Dishwashers Anodize Aluminum
It turns dull and darkens.
Can dishwashers anodize aluminum. The same thing can happen to your aluminum pots pans and baking sheets. Anodized aluminum pans can be easily recognized by their grey finish. However it is very common these days for hard coated cookware to have a non stick teflon like polymer coating. Any aluminum pot baking sheet or roasting pan that has not been anodized can become pitted or otherwise corroded by the harsh detergent used in the major kitchen appliance.
Cast aluminum cookware such as pots and pans are thicker and heavier than pressed aluminum cookware but they also tend to have a delicate finish which makes it completely unsuitable for dishwashers. If the aluminum has not been anodized the harsh detergent can cause pitting and corrosion. White spots can bloom on the surface of the aluminum cookware due to the alkalinity of the detergent. Anodized aluminum pans have a grey finish that is easily damaged in dishwashers.
It is hard anodized aluminum but has a non stick coating. They say the dishwasher detergent will damage the surface. According to the anolon website you can wash non stick coatings in the dishwasher but you can t wash hard anodized aluminum cookware in the dishwasher. As a general rule you should not place any aluminum pans in dishwashers.
Alkaline materials are widely used to strip anodizing from aluminum so i strongly doubt that there is any hardcoat which is dishwasher safe. If you ve ever put a shiny disposable aluminum pie plate in the dishwasher you ve seen what happens. Aluminum in the dishwasher isn t always a good idea. In fact it s very hard today to find any that doesn t.