I have come across small area of rust 😱 on the smallest slide (inside the slide). I don't use it and as it is unused I guess that is probably why it's gone rusty. However it never seems to gather water so it is ignored but maybe I should take more notice of it. How should I clean it away without harming the instrument? Thanks for your help! (besson sovereign compensating 1980's)
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Rusty slide
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Rick Floyd
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Is this visible from the outside of the slide, or is this something you are seeing on the interior of the slide? Are you able to post pictures of this?
You can get corrosion on the inside of slides. It's actually pretty normal. Metal without any protective coating will inevitably become oxidized.Sterling / Perantucci 1065HGS Euphonium, 1952 B&H Imperial Eb Tuba, and a bunch of trombones.
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I am curious about it too!
As my slide has a brown spot that looked like rust but a friend who operates an instrument shop said it's nothing to be worried about."Never over complicate things. Accept "bad" days. Always enjoy yourself when playing, love the sound we can make on our instruments (because that's why we all started playing the Euph)"
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Not rust. Just garden variety corrosion. The green stuff on the inside is normal. The brown on the outside of the slide is also normal for a wear spot. Many horns (like Besson, Sterling, etc.) have nickel plating on the tubes of the slide and it wears off over time, exposing raw brass underneath. The brass will oxidize. On old bronze or copper sculptures, they call this "patina" which is considered good. As long as you are not getting red rot (which will go all the way through the metal), this is mostly just surface.Adams E3 0.60 Sterling bell - Prototype top sprung valves
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That's perfectly fine. The green stuff is mineral deposits stained green from the oxidized copper in the brass. You also can get a reddish oxidation on the surface of brass as well. I would just scrub it out a bit, and carry on.Sterling / Perantucci 1065HGS Euphonium, 1952 B&H Imperial Eb Tuba, and a bunch of trombones.
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Originally posted by daruby View PostMany horns (like Besson, Sterling, etc.) have nickel plating on the tubes of the slide and it wears off over time, exposing raw brass underneath. The brass will oxidize.
What you're probably referring to is that many instruments have slide tubes made from solid nickel-silver tubing. Nickel-silver is an alloy of copper, zinc, and nickel which is also sometimes known as German Silver, or "white brass". It's often used for tuning slide tubes because it's harder than yellow brass, so it won't easily deform if you accidentally get a tube jammed in mis-aligned, and also because it resists corrosion better than yellow brass.
It does sometimes get reddish spots of corrosion on it. This isn't that a plating has worn through, it's that copper from within the alloy has migrated to the surface.--
Barry
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Nickel / German silver is very popular for the outer tuning slide tubes, again because of its more durable nature. Most professional level trombones, tubas, etc have nickel silver outer tuning slides. I think with my Sterling, the entire body is Nickel silver. All of the tuning slide legs are N / S, and unless they plate the inside of the tubes, those are all Nickel Silver as well. Some companies use Nickel Silver for the valve casings, which means when you put in a valve oil like hetman that can lift corrosion away, you end up with orange colored oil when you wipe down the pistons.Sterling / Perantucci 1065HGS Euphonium, 1952 B&H Imperial Eb Tuba, and a bunch of trombones.
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