On Thu, Oct 10, 2013 at 9:27 PM, A. Mani a.mani.cms@gmail.com wrote:
On Tue, Oct 8, 2013 at 12:22 PM, J T Dsouza jtd1959@gmail.com wrote:
No. BUT isopropyl alchol is usually adulterated with kerosene and naptha. That leaves a white residue. This residue is an excellent insulator. If
you
get it on the pins, there is some chance of the cpu becoming
intermittent.
So ideally immerse only the heatsink and cpu without getting the pins
into
alcohol.
rubbing alcohol is ~70% pure isopropyl + 30% distilled water.
If it leaves a white powdery residue, it is kerosene+naptha
OR get unadulterated alcohol - an extremely difficult ask, unless you
have
friends in the chemical industry.
Not really true. 99.95% pure is available but expensive.
Not quite sure if available in small quantities. It is available in big drums with excellent purity.
Slightly less pure but perfect for contacts is also available.
Another option would be to use acetone.
NEVER use acetone unless you are sure of the encapsulation material. It can chew quite a number of epoxies and plastics. Although CPUs have a ceramic substrate, the metal heatsink to ceramic bond is epoxy.