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+--- Thread: De-Galvanizing a punched-rivetted Hamata (/showthread.php?tid=14926)
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De-Galvanizing a punched-rivetted Hamata - QVINTVS ARTORIVS CORVINVS - 04-06-2009
OK,
Now that we have successfully de-grossified my DSC hamata, next project is to de-galvanize yet another.
I seem to remember reading something about using the stuff to chlorinate your swimming pool to remove it?
Phillip
Re: De-Galvanizing a punched-rivetted Hamata - jkaler48 - 04-06-2009
Whatever method please use a well ventilated area as the zinc fumes are not good for you at all.
Re: De-Galvanizing a punched-rivetted Hamata - QVINTVS ARTORIVS CORVINVS - 04-06-2009
Absolutely. Safety first, always :!:
Re: De-Galvanizing a punched-rivetted Hamata - M. Demetrius - 04-07-2009
I did mine this way, and had no trouble with anything.
:!: Do this outdoors and you shouldn't have to worry about the zinc fumes. They are lethally toxic in high concentrations. Not a joke. Welders and blacksmiths have died from breathing the zinc smoke from galvanized pipe and other metal. :!:
First, I bought two gallons of regular white vinegar at the grocery.
Second, I put the hamata in a 5 gallon bucket, clean.
Third, I agitated the bucket some a couple of times over two days.
When the bubbles stopped coming off the metal, the zinc was removed.
Wash in clear water.
Vinegar (or at least the acid in it) will have changed into some kind of zinc salt and water. I knew this from chemistry in school, not by tasting. What you do to discard this solution is probably better left unsaid.
Re: De-Galvanizing a punched-rivetted Hamata - QVINTVS ARTORIVS CORVINVS - 04-07-2009
Demetrius,
Very cool and low tech! Just what the Dr. ordered :wink:
One last thing... should I remove the leather edging, or is it safe on there?
Re: De-Galvanizing a punched-rivetted Hamata - M. Demetrius - 04-07-2009
I don't know. I didn't do it that way, as my edging wasn't leather covered until after it was de-zinked.
I'd think the leather would hold moisture against the rings too long, and give a place for rust to begin in a place where you couldn't find it easily. If it can be removed, that would probably be the better choice, then resew it when the links are dry and oiled. That would be my suggestion.
Re: De-Galvanizing a punched-rivetted Hamata - QVINTVS ARTORIVS CORVINVS - 04-07-2009
Reasonable postulation...
One last thing, I don't think it would adversely affect the brass?
Re: De-Galvanizing a punched-rivetted Hamata - M. Demetrius - 04-07-2009
I have used vinegar as a pre-clean on brass belt plates. It helps take off the tarnish and other discoloration, so I don't think it would hurt your brass parts. It might just shine them up some. Eventually, an acid will damage brass, but overnight shouldn't be a problem.
Famous last words, right? :|
Re: De-Galvanizing a punched-rivetted Hamata - QVINTVS ARTORIVS CORVINVS - 04-07-2009
I think you are right about that... it is sort of a pickling agent / non-abrasive brass cleaner
Re: De-Galvanizing a punched-rivetted Hamata - LUCIUS ALFENUS AVITIANUS - 04-07-2009
The brass can get a more red colour. Caution!
Re: De-Galvanizing a punched-rivetted Hamata - M. Demetrius - 04-07-2009
Red color, aye. Forgot about that. It seems to draw copper to the surface, or perhaps remove some of the zinc in the copper/zinc outer surface? But that polishes off pretty well, if you find it disturbing. OTOH, that makes the metal look a little more like "red brass", which might be a good thing. Hard to say.
Re: De-Galvanizing a punched-rivetted Hamata - QVINTVS ARTORIVS CORVINVS - 04-07-2009
Note to self ... remove brass and leather edging first
Re: De-Galvanizing a punched-rivetted Hamata - john m roberts - 04-07-2009
Try a piece of scrap brass in the solution you plan to use and see what happens. You may like it, who knows?
Re: De-Galvanizing a punched-rivetted Hamata - marvises - 04-08-2009
yeah i figure the chemicals what your working with would like shrivel up the leather like a raisin and tarnish the brass
Re: De-Galvanizing a punched-rivetted Hamata - M. Demetrius - 04-09-2009
It might be tough on the leather.