View Single Post
  #20  
Old 04-11-2009, 11:05 AM
rat156's Avatar
rat156
Registered User

rat156 is offline
 
Join Date: Aug 2005
Location: Melbourne
Posts: 1,653
Quote:
Originally Posted by marki View Post
Allan, I very much doubt the mirror has an AlO3 coating. MgF2 or SiO2 yes.

Mark
Actually raw Aluminium converts to the oxide faster than you can blink. The surface of almost all aluminium is coated in the oxide as soon as it's exposed to air. So it is possible that it is coated in Al oxide. Some mirror manufacturers coat with SiO2 after the deposition which is done in an atmosphere devoid of oxygen (and all other gasses). Most don't though.

Cheers
Stuart
Reply With Quote