Tank magnet

[mlinder]

You might want to explain that thought to all of the manufacturers of audio and video tapes. They were nothing more than a polyester base or PET that was coated with iron oxide and sealed. The record and erase heads simply realigned the magnetic domains produced by the iron oxide particles to contain readable signals that could be converted to sound, images or both.
You missed this one.

OK.

Rust, or Fe2O3, has a very weak response to magnetism. Not enough to have a magnet pick it up in your gas tank. Iron Oxide is used on tape in part because of it's weak response to magnetism.

[Adler]

I would think that while Iron Oxide is not magnetic, rust is rarely just iron oxide! It has flakes of unoxidized iron mixed in.

Anyhow, I think Ill slap an old harddrive magnet on the bottom of my tank in a spot that is visible and check it later to see if its caught anything. Cant hurt, I like the idea.

EDIT: I liked this guys explanation... http://answers.yahoo.com/question/in...4141352AAyrywl

[JEEPRUSTY]

I would think that while Iron Oxide is not magnetic, rust is rarely just iron oxide! It has flakes of unoxidized iron mixed in.

Anyhow, I think Ill slap an old harddrive magnet on the bottom of my tank in a spot that is visible and check it later to see if its caught anything. Cant hurt, I like the idea.

EDIT: I liked this guys explanation... http://answers.yahoo.com/question/in...4141352AAyrywl

yes good gollly those hard drive magnets are amazing for the size of them.
fragile but powerful.

[1948man]

When I was cleaning my carbs there was a reddish-brown clay-like residue in the bowls. It was attracted by a magnet but it seemed like the attraction was a little weak. I was trying to confirm it was rust.