Galvanised steel

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Galvanised steel

This topic has 11 replies, 7 voices, and was last updated 1 March 2018 at 11:08 by Ian S C.

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27 February 2018 at 10:34 #343385
sean logie
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@seanlogie69385
Saved a quantity of 20mm galvanised steel bar from the skip at work ,it was off an old handrail so me being me took it home . Any ideas how the galvanizing will machine in the lathe. I know I should just go and try it but I’m bored at work today so I thought I’d ask 😉.

Sean
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27 February 2018 at 10:34 #29793
sean logie
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@seanlogie69385
27 February 2018 at 10:44 #343386
Hopper
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@hopper
It's just zinc so machines right off without dramas.

If you want to weld it, grind the zinc off first. The fumes are toxic when welding zinc plated stuff.
27 February 2018 at 11:19 #343397
sean logie
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@seanlogie69385
Yeh it’s not nice to weld even after grinding .

Sean
27 February 2018 at 11:56 #343408
larry Phelan
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@larryphelan54019
It machines alright,but is not always very round. As regards welding it, no it,s not nice !
27 February 2018 at 12:19 #343416
Farmboy
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@farmboy
You soon find out if you are welding galvanised steel as you can taste the zinc fumes. I was told to drink a glass of milk when that happened (only the one time), as the calcium helps counteract the zinc absorption. Preferably don't do it!

Most of my welding was done outdoors so fumes would usually blow away.
27 February 2018 at 12:22 #343417
sean logie
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@seanlogie69385
I won’t be using the material for welding projects ,it’s just handy size to have.

Sean

Edited By sean logie on 27/02/2018 12:23:01
27 February 2018 at 12:27 #343421
Farmboy
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@farmboy
Sorry. Meant to add, I have turned galvanised with no problem, but the swarf can be a little dusty if it is old and weathered.
27 February 2018 at 13:29 #343435
Speedy Builder5
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@speedybuilder5
may be a poor quality steel as it didn't require much when in service as a handrail. You might find it hard to get a good surface finish.
BobH
1 March 2018 at 10:00 #343761
vintagengineer
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@vintagengineer
To remove zinc, soak overnight in a saturated solution of malt vinegar and table salt. This will dissolve the zinc and works well on nuts and bolts!
1 March 2018 at 10:12 #343765
Hopper
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@hopper
Posted by vintagengineer on 01/03/2018 10:00:26:

To remove zinc, soak overnight in a saturated solution of malt vinegar and table salt. This will dissolve the zinc and works well on nuts and bolts!

Thanks for that tip. Could be handy for using hardware store bolts etc on old motorbikes without them standing out like dog's ears.
1 March 2018 at 11:08 #343776
Ian S C
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@iansc
The galvanised nuts with the zinc removed will be a very sloppy fit on a standard bolt.

Ian S C
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