agent_entropy - 5-6-2015 at 07:27
I thought this was interesting:
Someone at work brought a hammer to show me. Apparently it had fallen into one of our 6 meter deep mixing tanks where a small amount of 49% HF was
left in the bottom. The hammer stayed there for 3 days until he found a magnet that he could use to retrieve it. Unfortunately I don't have a
"before" picture, but it was a brand new framing hammer and the HF basically turned it into a tack hammer without touching the handle.
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Magpie - 5-6-2015 at 07:44
That's awesome. Thanks for sharing. 
papaya - 5-6-2015 at 08:36
And from what are your tanks made from?
agent_entropy - 5-6-2015 at 09:14
The HF tank is steel lined with polypropylene.