RE: [TCML] primary tubing

["Brian" <brianv@xxxxxxxx>]

Herr Zapp,
Yep you are right, my plate thickness is what I wrote down I had to go look
at my data again...LOL That is what I get for trying to go off memory, but
the bottom line is we both know how it is done and we both know why it is
done and it will handle 450 RMS before it pops a hole in the anodized layer.
This I have tested over and over and it is repeatable. 

--Brian

-----Original Message-----
From: Quarkster [mailto:quarkster@xxxxxxx] 
Sent: Monday, November 09, 2009 11:14 AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] primary tubing

Brian -

As I said, anodizing is an electrochemical process, typically using a 
chromic or sulphuric acid bath in conjunction with a DC current to 
accelerate the formation of the surface oxide.

The total thickness of the aluminum oxide layer obtained by conventional 
(Type II) anodizing is typically between 2-25 micrometers, or .00008 - .001 
inch. "Hard anodizing" can generate oxide films up to 150 micrometers (.006 
inch) thick, but these tend to be very brittle, and any deformation of the 
underlying metal (bending or forming) can cause the oxide film to crack and 
flake off.

There is no known anodizing process that can generate an oxide layer 1/32 to

1/16 inch thick.

Regards,
Herr Zapp
----- Original Message ----- 
From: "Brian" <brianv@xxxxxxxx>
To: "'Tesla Coil Mailing List'" <tesla@xxxxxxxxxx>
Sent: Monday, November 09, 2009 5:59 AM
Subject: RE: [TCML] primary tubing


> Herr Zapp,
> You are correct in that they are similar however there are some 
> differences,
> aluminum is actually put into an acid bath to create the anodize and 
> change
> the molecular structure of the surface, I have tested various types of
> anodizing for voltage withstand, as anodizing changes the chemical makeup 
> of
> the surface, normal is depth is anywhere from 1/16" to 1/32" below the
> surface.
(snip) 



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