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#3165154 10/19/21 06:10 PM
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Are specs of light corrosion on strings a matter of concern, if they don't affect the sound of a piano? Or am I just tone deaf? Not even sure if I am seeing anything since nothing was mentioned during a recent tuning and pitch raise.

Last edited by Skeetcando; 10/19/21 06:12 PM.
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I'd say light corrosion on the steel strings in the tenor / treble won't affect the sound noticeably. I guess corrosion is more of a potential concern to a purchaser - does the amount of corrosion relative to the piano's age indicate the piano has been kept in a non-ideal environment? Will the corrosion cause any strings to break during tuning or hard use?


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Originally Posted by Ben_NZ
I'd say light corrosion on the steel strings in the tenor / treble won't affect the sound noticeably. I guess corrosion is more of a potential concern to a purchaser - does the amount of corrosion relative to the piano's age indicate the piano has been kept in a non-ideal environment? Will the corrosion cause any strings to break during tuning or hard use?

I've seen this many times on acoustic pianos, especially grand pianos, where you can get a really good look at the strings, as opposed to an upright, where the strings are more hidden behind the front panel and action. And, I've seen it on some later model pianos, as well as older pianos.

Of course, I'm talking about light rust/corrosion spots, and not heavy corrosion. I have seen pianos with substantial corrosion on the steel strings, to the point where I would not want that piano. The lighter rust spots can be cleaned/buffed off with some 0000 steel wool, but then the loose fibers of the steel wool would also need to be vacuumed/dusted off the area beneath the strings.

I've also seen older pianos where the strings were tarnished from age, which is normal. But there is a difference between natural tarnish and rust spots.

I agree with Ben, in that it probably doesn't affect the tone enough to be noticeable, but I have no scientific evidence of that.

Just my .02, rust free... smile

Rick


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For plain wire, it is the corrosion occurring at the termination points and tuning pins that weakens the wire and deadens the tone more than corrosion occurring out along the mid points.

For wound strings, corrosion between the core, winding and between windings themselves causes dead, "tubby", (as in washtub bass), sounding notes.

If you have a grand piano, it is a good idea to keep the top down except when you are playing it.

It is also a good idea to purchase and put into place a wool cloth string cover.


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Thank you all. I would say it is very light. It was just tuned by a member of the Piano Technicians Guild, if that means anything, and he didn't even mention any corrosion. He did say that I could lightly rub the strings with a soft cloth while vacuming but I though that was for dust. I really don't know too much, since it is my wife who plays and she is no professional. 8 years of lessons as a girl. I am familiar with the use of 0000 steel wool for the gentle removal of corrosion removal on firearms.


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