Busted zinc removal
- Thread starter ralphyost
- Start date
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If you have answers, please help by responding to the unanswered posts.
If you have answers, please help by responding to the unanswered posts.
A propane torch (plumbers torch) works great. Hold with a pair of pliers or vise grips and heat. The old zinc melts out.
Larry/Lena
Hobo KK42
Melaque, Jalisco, MX
Larry/Lena
Hobo KK42
Melaque, Jalisco, MX
Keith
Guru
- Joined
- Oct 5, 2007
- Messages
- 2,715
- Vessel Name
- Anastasia III
- Vessel Make
- Krogen 42
One thing to try is smacking a groove in it with a cold chisel so that you can use a big flat blade screwdriver to try to unscrew it.
If that fails, mix a 50/50 solution of muriatic (hydrochloric) acid and water (always add acid to water, NEVER the other way around) and it'll dissolve the zinc overnight.
If that fails, mix a 50/50 solution of muriatic (hydrochloric) acid and water (always add acid to water, NEVER the other way around) and it'll dissolve the zinc overnight.
OP
OP
ralphyost
Senior Member
Hey tom
I agree but I am doing this from home in my shop. I have a bag of old zinc caps that have been collected on my boat over the years and thought I would try to make some use of them.
One fellow suggested muriatic acid. I have the torch but not the acid so I will try the torch first.
R.
I agree but I am doing this from home in my shop. I have a bag of old zinc caps that have been collected on my boat over the years and thought I would try to make some use of them.
One fellow suggested muriatic acid. I have the torch but not the acid so I will try the torch first.
R.
Ralph:
I have successfully removed them when busted off flush with the bronze, just by driling into the zinc and working them around with a skinny screwdriver. Usually the zinc is really soft by teh time it busts off that close.
I have successfully removed them when busted off flush with the bronze, just by driling into the zinc and working them around with a skinny screwdriver. Usually the zinc is really soft by teh time it busts off that close.
OP
OP
ralphyost
Senior Member
Good suggestion....some of them are harder than others, probably representing various age and sacrificial life.
I just played with the torch for a while and got most of them cleared. Only burnt my thumb once LOL !
The torch method does not clean out the thread real well. Takes a lot of heat...more than I suspected when I started.
Would like to try muriatic acid next time and see how well that does. Certainly its less work.
R.
I just played with the torch for a while and got most of them cleared. Only burnt my thumb once LOL !
The torch method does not clean out the thread real well. Takes a lot of heat...more than I suspected when I started.
Would like to try muriatic acid next time and see how well that does. Certainly its less work.
R.
jleonard
Guru
- Joined
- Jun 25, 2008
- Messages
- 5,063
"Only burnt my thumb once LOL "
Ya done well there boy!!
Ya done well there boy!!
C lectric
Guru
I use, after drilling out the residue, a very stiff bristle , round wire brush, about 3/8" diam., to clean out the threads.
It's a relic from the days when I could afford some Snap on stuff. I've seen similar brushes elsewhere though.
Then an old *tap I ground off the end to produce a M.M.(mickey mouse)*version of a bottoming tap.
-- Edited by C lectric on Monday 6th of December 2010 05:05:05 PM
It's a relic from the days when I could afford some Snap on stuff. I've seen similar brushes elsewhere though.
Then an old *tap I ground off the end to produce a M.M.(mickey mouse)*version of a bottoming tap.
-- Edited by C lectric on Monday 6th of December 2010 05:05:05 PM
Datenight
Guru
For a stiff round wire brush use a copper fitting cleaning brush. Local plumbing supply houses, hardware stores or the big box stores have them. You can also cut the handle off and chuck them in a drill.
Rob
37' Sedan
Rob
37' Sedan
