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Nickel plating spot
Posted: Sun Dec 20, 2015 7:53 pm
by balchb
Like other Chinese horns, I have a blue/green spot on my 5th valve slide's nickel plated ring. The other dark spots on the horn I really don't care about because it is unfinished brass. This spot raises a concern because it looks to be somewhat corrosive... any thoughts to buff this out and remove it? There is a dark ring around the spot which is not quite the width of a dime.
Re: Nickel plating spot
Posted: Tue Dec 22, 2015 11:56 pm
by roweenie
Re: Nickel plating spot
Posted: Thu Dec 24, 2015 8:52 pm
by balchb
Curmudgeon wrote:Get some metal cleaner/polish like Maas, Flitz, or Wenol and polish it. Shouldn't be a big deal.
The only bad thing will be that you may be tempted to polish the whole tuba!
The horn is covered in blemishes in the finish, so I'm not worried about it. The one spot drew my attention with the dark ring and blue color... Probably should take care of that one...
Re: Nickel plating spot
Posted: Sat Dec 26, 2015 4:15 am
by Wyvern
A blue/green mark around joint means a remnant of soldering flux remained in joint and has subsequently seeped out. Cleaning with metal polish will usually remove.
Re: Nickel plating spot
Posted: Sat Dec 26, 2015 11:34 am
by balchb
Neptune wrote:A blue/green mark around joint means a remnant of soldering flux remained in joint and has subsequently seeped out. Cleaning with metal polish will usually remove.
Thanks!