Corrosion on newer LT Bach slide

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Mamaposaune
Posts: 657
Joined: Sep 22, 2018

by Mamaposaune »

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Hope this link comes through. Not my horn, I was just strolling through ads and noticed this newish Bach 16, and what looks like red-rot, or some type of corrosion, on the nickle-silver outer slide. (Pics 5+6)

What gives? Even if it was not well maintained (kept clean) it does not seem as if this should happen in just a few years.
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GabrielRice
Posts: 1496
Joined: Mar 23, 2018

by GabrielRice »

You can see problems on the bell too. That's not corrosion, and it's certainly not red rot. It's a lacquer problem.
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Cotboneman
Posts: 210
Joined: Jul 27, 2018

by Cotboneman »

I agree that does not look like red rot. What it looks like is a really poor lacquer application.
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Mamaposaune
Posts: 657
Joined: Sep 22, 2018

by Mamaposaune »

OK. I jumped to a conclusion there. Still, it doesn't seem like a new-ish trombone should have lacquer issues like that. Hope it's not common, although it should be covered by the warranty.
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hornbuilder
Posts: 1384
Joined: May 02, 2018

by hornbuilder »

Dezincification (red rot) does not occur in nickel silver. Looks like either a contaminant on or under the lacquer.
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tbonesullivan
Posts: 1959
Joined: Jul 02, 2019

by tbonesullivan »

Looks like either something messed with the lacquer, or the horn was not cleaned properly before lacquer. Also depends on how it has been stored, used, etc.