<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=us-ascii">
<META content="MSHTML 6.00.6000.16608" name=GENERATOR></HEAD>
<BODY>
<DIV dir=ltr align=left><SPAN class=641200018-21032008><FONT face=Arial
color=#0000ff size=2>I just filed the corrosion off a set of Sohmer keys, and
then sprayed lacquer on them....... No idea if it will work. I filed past
the corrosion.....</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=641200018-21032008><FONT face=Arial
color=#0000ff size=2>les bartlett</FONT></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> pianotech-bounces@ptg.org
[mailto:pianotech-bounces@ptg.org] <B>On Behalf Of </B>Willem
Blees<BR><B>Sent:</B> Wednesday, March 19, 2008 11:35 PM<BR><B>To:</B>
Pianotech@ptg.org<BR><B>Subject:</B> lead corrosion
revisited<BR></FONT><BR></DIV>
<DIV></DIV><WBR>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. (<A
href="http://www.dt.navy.mil/cnsm/lead_01.html">www.dt.navy.mil/cnsm/lead_01.html</A>.)<BR> <BR>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. <BR><BR>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. <BR><BR>Just thought I'd share that information with you
guys. <BR><BR>
<DIV style="CLEAR: both">Willem (Wim) Blees, RPT<BR>Piano
Tuner/Technician<BR>Honolulu, HI<BR>Author of <BR>The Business of Piano
Tuning<BR>available from Potter Press<BR>www.pianotuning.com</DIV>
<DIV class=aol_ad_footer id=u8CA585AD48873A3-106C-43CB><FONT
style="FONT: 10pt ARIAL, SAN-SERIF; COLOR: black">
<HR style="MARGIN-TOP: 10px">
Planning your summer road trip? Check out <A
title=http://travel.aol.com/travel-guide/united-states?ncid=aoltrv00030000000015
href="http://travel.aol.com/travel-guide/united-states?ncid=aoltrv00030000000015"
target=_blank>AOL Travel Guides</A>.</FONT> </DIV><BR>
<P><FONT size=2>No virus found in this incoming message.<BR>Checked by
AVG.<BR>Version: 7.5.519 / Virus Database: 269.21.7/1335 - Release Date:
03/19/2008 9:54 AM<BR></FONT></P></BODY></HTML>