At 03:30 PM 2/12/98 EST, you wrote: > >In a message dated 2/12/98 2:51:01 PM, Michael.Jorgensen@cmich.edu wrote: > ><< "I've wondered if vertigris is deposit created as a result of >electrolysis.">> > >Mike; > I think that there may be some component here but...........in the case of >S&S action rails, they are soldered to the brackets. Would not the solder >tin/zinc/lead) in this application be the less noble metal? I don't believe >that I have ever seen a bad solder joint where the joint was failing due to >anything other than a cold joint or a crack. Also I have seen extreme cases >of verdigris in actions without metal rails. Of course there still could be >an electrical connection along the wood surface as you speculate but I don't >know. I still have to lean heavily on parrafin/mineral spirits/organic >compounds as being the villian in the case of verdigris but I also think that >the electropositive origins of 'sulfide' as opposed to the chemical origins of >'sulfate' play the larger role in verdigris formation. >Jim Bryant (FL) > Gotta go with you on this one Jim. Electrolysis requires a complete circuit. One center pin suspended in wool and maple, saturated in a loosely defined lubricant of dubious origin does not a corrosion cell make. I ground too much of the real stuff from the bottoms of RF-4 wings in England to fall for that old trick. The original tallow probably contained some regular old NaCl that aided the process and produced the green. I wonder too if the residual lanolin in the bushing cloth didn't aid and abet the verdigris formation. Perhaps it's a natural polymerization process. Why is there never an organic chemist around when you need one? Ron Nossaman
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