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PNut Veteran Member
Joined: 08 Apr 2021 Posts: 114 Location: Canada
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Posted: Sat May 08, 2021 6:25 am Post subject: Chemical Reaction |
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1955 Olds Ambassador Trumpet:
I thoroughly clean the slider valves and receivers with soap and warm water, until there is no dirt left over.
I've done this twice. Every time I apply Yamaha Synthetic slide grease, work it in, and check movement, all is well.
Overnight a chemical reaction is occurring that causes the grease to turn black.
Is this a common problem?
I'm testing a portion with my Premium Saxophone Cork grease on one of the bottom valve cap threads to see if that causes the same reaction. I'll find out tomorrow morning. _________________ Gotta Love Music |
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Rwwilson Veteran Member
Joined: 13 Sep 2019 Posts: 186 Location: Austin Texas
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Posted: Sat May 08, 2021 8:15 am Post subject: |
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This is definitely not normal. After cleaning are the insides and outsides of the tubes brass colored? If so, it appears you are getting some oxidative corrosion of the brass over night. I suspect that the soap that you are using is not all being rinsed away and that it is the cause. |
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etc-etc Heavyweight Member
Joined: 19 Jan 2008 Posts: 6184
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Posted: Sat May 08, 2021 8:41 am Post subject: |
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Something similar happens with Alisyn slide and key oil - the oil remaining within the horn turns yellow with time. This may be due to alkene oxidation catalyzed by brass. |
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lipshurt Heavyweight Member
Joined: 24 Feb 2008 Posts: 2642 Location: vista ca
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Posted: Sat May 08, 2021 8:59 am Post subject: |
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If I use monster oil, it turns dark yellow right away, and it gets thicker. No other I’ll does that that I have tried. I thought at first that it was some kind of so, ent that was dissoving dark deposits in the casings, but it never stopped turning yellow. _________________ Mouthpiece Maker
vintage Trumpet design enthusiast
www.meeuwsenmouthpieces.com
www.youtube.com/lipshurt |
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yourbrass Heavyweight Member
Joined: 12 Jun 2011 Posts: 3633 Location: Pacifica, CA, USA
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Posted: Sat May 08, 2021 9:15 am Post subject: |
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For slides that don't have to move quickly (tuning, 2nd, 3rd water slide) I use anhydrous lanolin. You can cut it thinner with any valve oil you like. I believe that Schilke slide grease is lanolin. It has a yellow color, but goes on clear, thinly. _________________ "Strive for tone." -John Coppola
Edwards X-13
ACB MV3C /ACB A1/26 backbore
https://yourbrass.com/ |
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OldSchoolEuph Heavyweight Member
Joined: 07 Apr 2012 Posts: 2440
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Posted: Sat May 08, 2021 5:07 pm Post subject: |
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That is not at all common.
It sounds like the brass is being oxidized, which is damage happening in real time. Has this horn been recently ultrasonically cleaned? (I am suspecting a residual caustic, or something that becomes more caustic in the presence of the lubricants.) _________________ Ron Berndt
www.trumpet-history.com
2017 Austin Winds Stage 466
1962 Mt. Vernon Bach 43
1954 Holton 49 Stratodyne
1927 Conn 22B
1957 Holton 27 cornet
1985 Yamaha YEP-621
1975 Yamaha YEP-321 Custom
1965 Besson Baritone
1975 Olds Recording R-20 |
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PNut Veteran Member
Joined: 08 Apr 2021 Posts: 114 Location: Canada
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Posted: Tue May 11, 2021 11:53 am Post subject: |
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I figured it out. There was some residual buffing compound that I didn't clean off properly. Dawn dish soap, and whamo, problem solved! _________________ Gotta Love Music |
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blbaumgarn Heavyweight Member
Joined: 26 Jul 2017 Posts: 705
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Posted: Tue May 11, 2021 7:54 pm Post subject: Chemical reaction |
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Good for you PNut, really. _________________ "There are two sides to a trumpeter's personality,
there is one that lives to lay waste to woodwinds and strings, leaving them lie blue and lifeless along a swath of destruction that is a
trumpeter's fury-then there is the dark side!" Irving Bush |
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