anodizing dewars

[geary%cfa3.DECNET at cfa.harvard.edu]

Roger Smith recently wrote:

>Presumably, the only surfaces which can outgas are the warm ones. 
>Our dewar interiors are polished Aluminium, and while they are
>explicitly not anodized, they will of course be oxidised.  Anodized
>surface scan adsorb/absorb sig-nificant amounts of water which is
>hard to pump out and will later outgas.   Perhaps we should only
>open dewars in dehumidified air!
>Does anyone reading this coat treat internal surfaces in any way 
>to reduce this effect? Has anyone switched to alternate materials
>because of it?

I seem to recall that Gerry Luppino told me that they do indeed
anodize the insides of their dewars, with good success.

How about this, Ger ??

--John Geary