Originally Posted by Eagle & Bear
I have read on several posts that oven cleaner will remove the anodized/satin surface treatment on aluminum. I applied a heavy layer of oven cleaner on the aluminum arms of the awning and left it on for over 4 hours. They still have the satin look. Will anything else take the anodized/satin surface off of aluminum parts?
Anodized aluminum, is made by chemically changing the surface to a different material, if you wish.
The surface of the anodized aluminum, is also an electrical insulator, in that it will not pass electricity.
Anodizing is done by submerging the metal into a temperature controlled vat of sulfuric acid, and running a DC currect thru the plate, for about 45 minutes as I recall. Then the metal is subjected to a "sealing process" by submerging it into a very hot oil bath for a period of time.
The only way an anodized surface of aluminum can be removed is by some tremendous sanding, to totally removed that insulated surface.
If you take a strip of anodized aluminum and bend it next to your ear, you will hear a cracking sound, which is coming from the surface cracking, which you cannot see with the naked eye.