Re: Coating on Toroid

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Dave,

On 6 Mar 2002, at 19:46, Tesla list wrote:

> Original poster: "Dave Leddon by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<leddon-at-attbi-dot-com>
> 
> Geeks,
> 
> I have now run my coil for a grand total of 15 minutes and have noticed
> that the luster has gone out of my toroid.  It seems to be coated with a
> translucent haze which comes off easily went wiped with a cloth.  Is this a
> chemical reaction between the aluminum and ozone?  The ozone levels have
> been getting pretty high, I had to flee the garage last night when I was
> siezed with a prolonged coughing spell after running the coil continuously
> for about 5 minutes.  Anybody else notice this accumulation on their toroids?
> 
> Dave

Par for the course I'm afraid. Aluminium is extremely reactive. Most 
of the time you don't notice as it forms an oxide layer on contact 
with air which prevents further oxidation. In fact, to paint it with 
any degree of success, you have to scrape right through the 
oxidation. This is all the excuse I need for using cooking foil.

Regards,
malcolm