Why Varnish deposits where it does.

[Shannow]

http://www.rccnow.com/documents/fluitec/Insoluble to Soluble Varnish versus Temperature.wmv

edit - copy and paste the whole line

 

[Samilcar]

http://www.rccnow.com/documents/fluitec/...Temperature.wmv

 

[Tempest]

If I'm looking at this correctly, the "cloud" agglomerates at the bottom at about 50C, which is pretty low. I assume this is showing that the "debris" is attracted to heat, or am I missing something?

 

[Shannow]

At the bottom is a magnetic stirrer.

At low temp, the varnish is dispersed in the oil, held up by the stirring rather than dropping out.

As the temperature increases, it dissolves.

That's what we find in big oil systems of varying temps...the varnish drops out in the cold spots.

 

[Tempest]

Got it. Thanks for the clarification.

 

[spasm3]

I'd always wondered if varnish was a form of condensate from volatility.

 

[Shannow]

I'll let you know in a few months.

We've just commissioned an undergrad thesis into varnish formation and monitoring...looks like an awesome project.