dorianm421
29.04.2021 10:36:21
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I agree with electricpete. Unless you are loosing large amounts of metal, the effect on motor performance should be negligible. He does have valid concerns about contaminating the bearings and windings, I would worry about that more than anything else.
I go along with the previous posts, it would have to be pretty bad to give an increase in airgap. more
The treatment was intended for corrosion protection. The insides of the DC traction motor stators (confusingly referred to as "the magnet") were also varnished internally for the same reason. This air-drying varnish (red or grey usually) was applied by spraying and went over the impregnation varnish - the whole stator assembly including the frame having already received a VPI. [links]
There isn't usually a rust problem when there are rotor windings which are impregnated, and often they are subsequently spray-coated with an anti-tracking varnish. It is not uncommon to varnish induction motor rotors either. more
Small cast rotor motor I don't think there are any rotor cooling air ducts like large motor, so doesn't seem likely any concern about reduced cooling.
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Take it out and soda blast it.
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When i took it apart to help me ID the size motor i discovered it has some rust on it,
don't want to post pictures all over the show so i'll refer to my previous link if you really want to look at it:
I don't want to put a thick covering of anti rust or something on this. Will a sharpy do ? more
This axi motor of mine is about 8 years old, been standing for most of those years
somewhere in a dark closet.