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Originally posted by PJK View PostThe timber you used appears to be oak, the tannic acid in the oak even if it is varnished, will corrode the level and the case.
Machinist boxes have been made of oak for over a hundred years, and if that were correct, the tools in them should be mere wisps of rust by now.
I have never had a tool corroded in an oak chest yet.2801 3147 6749 8779 4900 4900 4900
Keep eye on ball.
Hashim Khan
It's just a box of rain, I don't know who put it there.
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Originally posted by J Tiers View Post
I think this is totally wrong.
Machinist boxes have been made of oak for over a hundred years, and if that were correct, the tools in them should be mere wisps of rust by now.
I have never had a tool corroded in an oak chest yet.
https://www.popularwoodworking.com/t...bonizing_wood/
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Originally posted by Tungsten dipper View Post
They are lined in felt. Look up oak and tannic acid. I didn't believe this at first, but they use steel to make a stain for oak. It's called Ebonizing.
https://www.popularwoodworking.com/t...bonizing_wood/
Wood glues will corrode steel. years ago I had made a holder for a spare overarm (with vertical head). It was made with regular yellow wood glue, and allowed to dry for a week. It was felt covered. When the overarm was put on it, the surface was quickly rusted. I had to use hide glue to avoid the rusting, despite the glue being very thoroughly dry.
The hide glue was allowed to dry overnight, and never has caused a problem.
Felt is no barrier to rusting whatsoever.
Tannic acid will turn steel a black color, I have tried it (it has no anti-rust properties, though). Presumably that can be used to blacken the oak.
The amount in oak has never blackened anything of mine, neither the oak nor the steel. I do not think it is any sort of serious issue. Perhaps if water gets in and extracts tannins from the oak there could be an issue, but if there is water in the toolbox, I think you have problems which will totally obscure any issue with oak and tannins.😁😉Last edited by J Tiers; 11-20-2020, 01:00 PM.2801 3147 6749 8779 4900 4900 4900
Keep eye on ball.
Hashim Khan
It's just a box of rain, I don't know who put it there.
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Ya, I have oak cases that I’ve built over the last 30 years, and have yet to see any problem. Also an oak Gerstner machinists chest. I would think that if oak was any problem whosoever that the gerstner factory would have been able to see it in the last 100 years or so.I cut it off twice; it's still too short
Oregon, USA
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If the oak wood is kiln dried, and the box is not subject to water or high humidity, there may be no problem with tannin and corrosion. Here is some info (although more for building timbers and not cabinetry):
https://www.englishwoodlandstimber.c...cladding-beam/
https://www.woodworkingarchive.biz/s...nnic-acid.html (ebonizing)
https://www.fpl.fs.fed.us/documnts/p...zelinka003.pdf (effect of tannins on corrosion of steel)
http://pauleschoen.com/pix/PM08_P76_P54.png
Paul , P S Technology, Inc. and MrTibbs
USA Maryland 21030
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I got a 3D printer that I'm putting together.
https://www.youtube.com/watch?v=sf3Y_sdMJoU
Things are going slow because of my shakiness.
As far as the oak problem, maybe check with this outfit
https://gerstnerusa.com/shop/1805-chest/
Last edited by KIMFAB; 11-21-2020, 02:48 AM.Guaranteed not to rust, bust, collect dust, bend, chip, crack or peel
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Originally posted by Baz View Post
Then you are very lucky and perhaps in a dry area. Old wrought iron nails were better but modern nails and damp will be a problem in only 20 years or so.
Old nails probably had a higher copper content, which has made steels more resistant to rust.
Point being that oak has been in use for hundreds of years, including in shipbuilding, the material does not seem to rust everything away as has been suggested.2801 3147 6749 8779 4900 4900 4900
Keep eye on ball.
Hashim Khan
It's just a box of rain, I don't know who put it there.
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