anodized surfaces

[David Ouellette]

Posted to CCD-world:
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I'm not sure exactly what information you are after, but I offer the following information from the Newport catalog #100 p. B-4:

" Anodizing [italicized] has a particularly dramatic effect on outgassing rates.  The beautiful etched surface produced by anodizing is sponge-like on a microscopic level and has a true surface area many times its apparent size.  For example, the true area of a piece of bare aluminum is only six times its geometric area; when anodized, the area is effectively multiplies 400 to 900 [italicized] times.  Typical anodized aluminum contributes 3E-7 Torr-liter/sec of outgassing per square centimeter per mil thickness [italicized] of surface. "

There is more information, and makes for a quick read with the morning's coffee. 

--Dave

David Ouellette
Steward Observatory
CCD Laboratory
933 N. Cherry Avenue
Tucson, AZ  82721-0065  

Phone:  520-621-5228
Fax:	520-626-4330
Email:  douellette at as.arizona.edu
Web: http://sauron.as.arizona.edu/ccdlab/

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