Could be impurities in the lead which actegorize it, sort of, as "pot metal' ??? Thumpe --- Willem Blees <wimblees at aol.com> wrote: > At our meeting last night, one of the members > brought up something very interesting. He did some > research and found information from "Lead Corrosion > in Exhibition Ship Models-?Carderock Division of > NAVSEA Warfare Center. > (www.dt.navy.mil/cnsm/lead_01.html.) > ? > In a nutshell, it is not necessarily high humidity > that causes lead to corrode. It seems that wood and > glue causes lead to corrode. All woods contain > acetic acid, which causes lead to corrode. It is > also?the chemicals found in glues and even the > punchings. > > But what is interesting is, why are some leads > susceptible to corrosion, and not others? The > consensus amongst the other three techs here, > is?that 25 year or older Sohmer and Kimball pianos > are the worst. At least here in Hawaii.?What is it > in the make up of the lead in those pianos that > causes them to corrode? I have found a few pianos > back in St. Louis with this problem, but not as many > as here. (I've done 10 sets of keys?out of about 225 > pianos,?just since I got here) Although other pianos > have that problem, it is?very seldom. It happens > only occasionally in Asian made pianos, but then > there aren't that many that are more than 30 years > old.? > > Just thought I'd share that information with you > guys.?? > > > Willem (Wim) Blees, RPT > Piano Tuner/Technician > Honolulu, HI > Author of > The Business of Piano Tuning > available from Potter Press > www.pianotuning.com > ____________________________________________________________________________________ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping
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