If this stuff is what I think it is, it does contain a sand of sharp, probably aluminum oxide, abrasive.
The idea is when you bolt the connection together, the abrasive will break through the aluminum oxide layer on the conductors, and will mushroom out the aluminum as the abrasive burrows in, making lots of pure aluminum metal contacts. Usually, it also contains a dense oil to keep oxygen away, and prevent further oxidization of the aluminum. -Chuck Harris george wrote: > The reason that DC is used commercially to measure resistance is simple, if > you > use AC you may well get the reactive component as well as the resistance > coming > into play. > > Such low resistance measurements commercially are normally only made on high > current power distribution networks as part of a periodic test regime where > you > need to determine the quality/resistance of such things as bus bar > joints/connections and loop resistance. > > It is not a good idea to use copperslip around aluminium, there is an > aluminium > based version that should be used, but, be warned, just like copperslip it is > an > insulator, try putting your meter probes, set for resistance, into a tub of > both, > I have. I do not know just why but the aluminium version is just like sand, > it > gets everywhere when you use it. > > To check your joint I would use a four wire Kelvin set up using say 10 Amps > from > my constant current bench supply and then use my Keithly 616 digital > electrometer > to measure the voltage/s present across the joint, a simple application of > Ohms > law will then give the resistance. > > 73 George G6HIG _______________________________________________ volt-nuts > mailing > list -- volt-nuts@febo.com To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the > instructions there. > _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
