Not sure about freezing it . It will contract the metal, mas that poses a bigger threat . It can break the aluminum casing, or the copper block if enough corroded, or both... or nothing because the gunk keeps things tight
.
A few more pics... good thing my base if a 50x50x5 mm copper plate, "aha! corrode that will you.".
A few more pics... :
It corroded and broke the aluminum casing. A really nice crack there.
Full view of the mess.
This is the vertical cut of the first picture of my first post, you can see more of the extensive damage.
It also gives me the ideia that it's cold fitted in the aluminum casing (by a machine naturally).