-- [ Picked text/plain from multipart/alternative ] Hi, One of the causes of red rot, or dezincifacation, is caused by acids that are not properly neutralized during the manufacturing process. Soldering acids and an acid known as Brite Dip , which is used to clean and prep parts before soldering, must be thoroughly rinsed and neutralized. After a horn has been completed in the mounting department the Holton company soaks every component in a baking soda solution, and then puts the horn in a tank where a reverse current is run through the horn to remove all acids and impurities that adhere inside and out. In the 70s Leblanc was buying brass instruments from Yamaha to fill orders for the student lines that were made in the Martin plant. Yamaha had copied many of the processes that Holton used, but apparently missed the above operations.The T602R and C602R instruments had leadpipes that were rife with red rot. Hundreds of trumpets and cornets were returned to the Martin plant for leadpipe replacement. Yamaha started using red brass leadpipes to allay the problem. Many brass instrument makers still use yellow brass for their leadpipes, and if the proper procedures are followed there is no problem with red rot.
Wes Hatch _______________________________________________ Horn mailing list [EMAIL PROTECTED] http://music.memphis.edu/mailman/listinfo/horn
