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Chemistry Forums for Students => Physical Chemistry Forum => Topic started by: hahahanna on August 04, 2010, 03:17:01 AM

Title: Oxidation stability ASTM D2440
Post by: hahahanna on August 04, 2010, 03:17:01 AM

Hi!

Im working with ASTM D2440, im oxidizing transformer mineral oils.
In the method it stands that I should avoid using rubber connections between the
oxygen deliver tube and the oil receptacle and head. But why?
What can the rubber-tubes cause? Does the oxygen get contaminated or what happens?
In the method it stands also that I can use rubber connection if the rubber is in room temperature.


Can someone explain to me? I have never worked with this before.

Title: Re: Oxidation stability ASTM D2440
Post by: Stepan on August 16, 2010, 09:47:24 AM

Pure oxygen theoretically can ignite oil and rubber. Compressed oxygen will do it for sure with possible explosion.

Also, regular rubber rapidly deteriorate under oxygen and will eventually crack. You may want to use oxygen rated products.