Aluminum itself does not rust, as rusting is a term specifically used for iron or steel corrosion. However, aluminum pans can develop discoloration or oxidation over time, which may appear similar to rust. Here's a process you can follow to remove such discoloration from an aluminum frying pan:
Create a Cleaning Solution: Mix equal parts of white vinegar and water in a bowl or container. You can also add a squeeze of lemon juice for extra cleaning power.
Soak the Pan: Submerge the rusty areas of the aluminum pan in the vinegar solution. If the entire pan is affected, you can soak the entire pan.
Let it Sit: Allow the pan to soak for at least 1-2 hours, or overnight for more severe rust or discoloration.
Scrub Gently: After soaking, use a non-abrasive sponge or cloth to scrub the rusty areas. Apply gentle pressure and work in circular motions. Avoid using steel wool or abrasive scrubbers, as they can scratch the surface of the aluminum.
Rinse and Dry: Thoroughly rinse the pan with warm water to remove any remaining vinegar solution. Dry the pan completely with a clean towel.
Polish (optional): If there are still signs of discoloration or you want to restore the shine of the pan, you can use a non-abrasive aluminum polish or a mixture of baking soda and water. Apply the polish or paste to a soft cloth and gently rub the affected areas. Rinse and dry the pan once again.
It's worth noting that some degree of discoloration or staining may be difficult to remove entirely, especially if it has deeply penetrated the aluminum. However, following the steps above should help improve the appearance of the pan and reduce the visibility of rust-like spots.