Frozen micrometer

[awemawson]

No, the 'Well no' was aimed at the fact that it matters not a jot that the object to be de-rusted is all one piece, it normally would be.

It does matter however that the rust is 'in shadow' in this case as it's inside a male & female screw (if this is what the problem is - unproven as yet), and there would be very little reaction in the inter-thread parts.

[Arbalest]

If the electrolyte touches the rusted parts it should work. If the parts have already been soaked in oil then it's more doubtful.

[stevec]

(04-24-2014, 07:03 AM)awemawson Wrote: there would be very little reaction in the inter-thread parts.

My point exactly!

[stevec]

(04-24-2014, 01:29 PM)Arbalest Wrote: If the electrolyte touches the rusted parts it should work. If the parts have already been soaked in oil then it's more doubtful.

Its not the " electrolyte" touching the parts as much as the "conductivity" between the anode and the cathode.

[Arbalest]

You can't get conductivity between the anode and cathode without the Electrolyte.

[Highpower]

(04-22-2014, 11:29 AM)JScott Wrote: ........
Now, my question is, what can I do with it? I have not tried to force it other than trying to turn it by hand. My first idea is to soak it in a penetrating oil such as automatic transmission fluid for a few weeks to see if that will help to free it up. I'm looking for suggestions to rehabilitate this mic although I don't know if it will still have precision if I do get it turning again.

Thanks in advance for the advice and help I know is coming.

Do you by chance own, or have access to an ultrasonic cleaner? Warm water and Simple Green could work wonders on any dried up oil and the vibration just might work loose a stuck spindle lock. I would try that before any electrolysis. JMHO.

[stevec]

(04-25-2014, 03:02 AM)Arbalest Wrote: You can't get conductivity between the anode and cathode without the Electrolyte.

Yes, but once the conductivity is established between the anode and cathode there will be no further conductivity happening between the mic and it's internal parts via the Electrolyte.

[DaveH]

I once knew a Mr & Mrs Ode.
They named their 3 daughters Di, Tri and Tetr. Their son they named Pent.


DaveH

[Highpower]

I suppose that's better than naming their son Comm.

[JScott]

Well, the micrometer battle is not going my way. I have been soaking the spindle, lock and thimble in Kroil since last week. I have heated it up with a heat gun (hairdryer), I have frozen it with canned air turned upside down, I have hammered on it with my non-marring hammer and twisted on it to no avail. There is some rust colored sludge coming out between the thimble and the barrel but this could go on forever.

Thanks for all the suggestions everybody. Looks like this mic is going to end up as a "wall hanger". Oh well, back to the auctions.