Raw copper trumpet bell

Discussion in 'Trumpet Discussion' started by Comet1995, Jan 27, 2015.

  1. Comet1995

    Comet1995 Pianissimo User

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    So i'm doing some work on a trumpet for someone, (I am a repair technician) he wants me to put a raw solid copper bell onto his Kanstul besson meha trumpet. I got the parts from kanstul no problem. I find myself curious about how the bell will deteriorate. Being raw copper, would it potentially get red rot? Maybe faster than a yellow brass bell?
     
  2. tobylou8

    tobylou8 Utimate User

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    Solid copper can't get red rot.
     
  3. Comet1995

    Comet1995 Pianissimo User

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    Thanks for the information!
     
  4. gordonfurr1

    gordonfurr1 Forte User

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    At first I thought you said "RED HOT"...and I thought "HOPE SO".
     
  5. barliman2001

    barliman2001 Fortissimo User

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    A few basics for you: Brass is an alloy of copper and zinc. Red rot is a condition when the zinc in the alloy wants to get away and somehow (don't ask me how) separates itself and leaks out. So if you don't have zinc, you can't have red rot (which, in German is called "Zinkfraß", meaning zinc mildew.)
     
  6. Vulgano Brother

    Vulgano Brother Moderator Staff Member

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    Something new learned! I always thought fraß came from fressen, "to eat."
     
  7. barliman2001

    barliman2001 Fortissimo User

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    Of course it does; but how to get that into a handy English phrase?
     
  8. tobylou8

    tobylou8 Utimate User

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    Is not mildew another word for cheese? :-)
     
  9. Newell Post

    Newell Post Piano User

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    ...bells rarely get red rot anyway. It's usually in the lead pipe or other things "before" the bell, except in extreme cases.....
     
  10. robrtx

    robrtx Mezzo Forte User

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    I thought that one reason some manufacturers use rose brass for lead pipes is that it is less prone to red rot than yellow brass due to the higher copper content.......:think:
     

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