[rescue] Various machines for sale

[Dave McGuire]

On 1/9/25 17:35, Joshua Boyd via rescue wrote:
> But, on the disk side, wasn't Fe2O3 used for awhile on disk platters?  I 
> imagine they changed at some point, but finding details on when and to 
> what are not turning up in 5 minutes of googling.  A paper from 2003 
> talks about Nitrogenated and hydrogenated amorphous carbon films, but I 
> think they are talking about a protective layer over the magnetic 
> material.  Wikipedia says something about a cobalt based alloy, but I 
> can't find anything definite beyond that, and when I go looking for 
> Cobalt alloys, they mostly seem to be cobalt and iron and other stuff. 
> If the other stuff includes oxygen, I suspect that would mean it was 
> still fair to call it ferrous oxide.

   Sure, but that doesn't make it "rust".

            -Dave

-- 
Dave McGuire, AK4HZ
New Kensington, PA