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Solder is definitely not corrosion-proof; rather...
Posted by RayF (more from RayF) on Tue, 5 Apr 2005 09:51:05
In Reply to: Re: Butt connector/solder them., kyle morley, Tue, 5 Apr 2005 07:05:50
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...it is quite inclined to corrode in presence of say road salt and water. As a metal dissimilar to the copper, and as an alloy of metals itself, it can and will corrode.
I own a 1987 Ford F-150 truck. I guess either to save wire, or to aid in assembly, inside the outer jackets of the wiring harness Ford put random solder joints in some of the wires, just about 1/4" of wire, totally uninsulated and unprotected other than the outer jacket and tape making up the wiring bundles. I found and fixed two of these that had degraded to barely more than white powder, in tracking down mysterious electrical problems. The truck had spent some time near salt water but hadn't ever been submerged and these were in harness way up on the top of the fender wells and engine compartment so hadn't gotten road salt there.
So, Kyle, you're right about crimp connectors and corrosion but don't be so sure about solder.
Also, any place the outer insulation jacket is broken, salt water can wick
up inside along the strands of the copper wire and make internal corrosion there which can spoil conductivity some; which you can observe if you cut back insulation near corroded terminal ends when you go to splice new ends on. Sometimes have to go quite a ways or even splice in new wire.
posted by 64.222.211...
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