<VV> Rust never sleeps/ magnetic tape

[jvhroberts at aol.com]

That, and there's more than one iron oxide. Fe2O3 isn't very magnetic. Fe3O4 is VERY magnetic. This is what's in ferrite magnets, tape coatings, etc. 

John Roberts


-----Original Message-----
From: Frank DuVal <corvairduval at cox.net>
To: virtualvairs <virtualvairs at corvair.org>
Sent: Sun, Mar 31, 2013 6:12 pm
Subject: Re: <VV> Rust never sleeps/ magnetic tape


Thanks Jon,

I should have thought of that since I have used all the types of 
magnetic tape (yes, even 2") in my electronics hobby/career.

But even past that, I worked for a company that made the polyester film 
that other companies coated with iron oxide to make magnetic tape!

Frank DuVal

On 3/31/2013 12:41 PM, Jon Woolf wrote:
> OK, so I have looked at a number of sources- seems different metals when
> they rust, can be either magnetic or not. Iron Oxide is. Think cassette
> audio tapes- that is how they work. The Oxide coating is magnetic.

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