Question How Much Internal Corrosion on Steel Tank is Allowable?

[northcoastdiver]

I recently acquired this Norris steel 72 after a brief look inside (the outside is great). At first I thought it looked ok, but now I'm second guessing myself; is this able to be tumbled, or is this bad enough to fail a VIP? When I glance inside it doesn't look like there's any significant pitting, but some of the pics don't look great when I zoom in.

 

[Tracy]

That will likely be fine after a quick tumble. Those pits look more like surface flakes and there is space between them. Tumble it out and see what you have.

 

[Tanks A Lot]

This is virtually no corrosion whatsoever. Tumbling would not be necessary, a very very quick work with a flail would suffice.

 

[rjack321]

Tumble and acid wash and 99% chance you're totally fine (its hard to see if the flakes are hiding pits)