Ringing Coolant:Second post after chem test.

May 31, 2012 2 Replies
J

I just completed a basic test on a small amount of the coolant that was used in the induction heater coil CNC machine.



Under DC, it does not seem to have much of any conducting properties how ever, I placed the coolant in a tin can, use the can as one electrode, then inserted a round metal tube down through the center as the second electrode.



It appears this fluid is very reactive!. With the surface area I tested at 50Khz from the generator, R and scope attached, it looks like Xc is around ~ 100. give or take a bit.. it changes as you move the second electrode around in the fluid.



I tested some old fluid he brought over to my home shop and that is also reactive but very little, not even enough to worry about. It also has some DC r in it, could just be spent (contaminated) fluid causing that.



This coolant looks like propylene glycol. I wonder if he should be using ethylene glycol instead?



Any one know if there is a strong electrolyte in these chims?



Or maybe, it suppose to be diluted?



Jamie


Vote
Twitter Facebook LinkedIn
T

Is there any chance that he can call the coolant manufacturer and discuss the problem?

If he's diluting it there's a good chance that he should be using distilled water -- but without that conversation with the manufacturer, nothing I say means squat.

Even if he can't return it, maybe they'll tell him he can use it in his car!

My liberal friends think I'm a conservative kook. My conservative friends think I'm a liberal kook. Why am I not happy that they have found common ground? Tim Wescott, Communications, Control, Circuits & Software http://www.wescottdesign.com
Vote
Twitter Facebook LinkedIn
J

He's going to call them tomorrow. He is trying vary hard not to get me to come to his shop. I don't do those types of calls for free. :)

But I was a nice guy today and give him some data to work with for the call he's going to make tomorrow.

I think I already know what they're going to tell him, get a plastic heat exchanger in the tank. Current it does not have this.

Jamie

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required