I've got a 1.2mm drill snapped off in some brass, is there any way dissolving it out? I thinkI remember something about Alum.
Thanks Alan
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16 years ago
Dissolving steel in Brass
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16 years ago
Alum is correct Alan. Dissolve alum in water and immerse your lump of brass overnight.
Cliff Coggin Kent UK
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16 years ago
Wear gloves to avoid dissolving Alan in Alum
AWEM
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16 years ago
Wear RUBBER gloves to avoid dissolvig gloves and Alan in alum
Regards, Tony
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16 years ago
Many Thanks Alan
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16 years ago
I frequently have to remove steel pins from brass musical bo
cylinders. The stuff to use is dilute Sulphuric Acid (Car Battery Acid).
Please be careful with it, its not for playing with !!
Sharpen your drills with a tiny flat on the cutting edge, it wont gra then.
Phi
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16 years ago
Surely that will dezincify the brass? Won't you end up with a copper sponge ?
AWEM
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16 years ago
Hi Andrew
A fair point.
You must not leave it in any longer than is needed to remove the pins this is how it has been done for the last 100 years or so and it seem to work a treat if you are careful with the acid strength, typically 1 hours will do the job in dilute Sulphuric.
Phi
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