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A smear of Vaseline?

Opened up a 32A rotary isolator (IP65) mounted on an outside wall and found traces of condensation within and corroded terminals/cable ends; not helped by the use of steel screws and I suspect the cage.

I will be replacing the isolator, but how to prevent or lessen corrosion?

A good smear of Vaseline before tightening the terminals comes to mind, but is that a good idea? I guess Vaseline is an insulator (Google seems to suggest it is and it isn't), but when used during the connection of a car starter battery, any reduction in surface contact must be minimal since I have never seen signs of overheating.

If not Vaseline, how about Copperslip?

Clive

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0 Zoomup over 2 years ago

I use a Superlube synthetic grease for any terminals and screw threads that might corrode, especially screws that might need to be undone in the future. To reduce corrosion I always drill a small drainage/vent hole or two in the bottom of general domestic outdoor enclosures. It prevents condensation build up. Anything that keeps the damp off the vulnerable parts may be good to reduce corrosion like Vaseline.

Z.
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0 Zoomup over 2 years ago

I use a Superlube synthetic grease for any terminals and screw threads that might corrode, especially screws that might need to be undone in the future. To reduce corrosion I always drill a small drainage/vent hole or two in the bottom of general domestic outdoor enclosures. It prevents condensation build up. Anything that keeps the damp off the vulnerable parts may be good to reduce corrosion like Vaseline.

Z.
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A smear of Vaseline?

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