madalch@xxxxxxxxxxxx wrote;
"Or the CaCl2 simply absorbed moisture from the air, thus making the
aluminum damp. This allowed the copper sulphate to dissolve and attack
the aluminum."
______________________________________
Re:
Thanks, that's what I suspected and it does make sense... I will try it
again in a more controlled manner in the near future as I am curious as
to what the gas (the sizzle that I heard) being liberated was; chlorine?
hydrogen?
Hydrogen.
Once the oxide barrier has been removed Al dissolves quite readily in water.
Re: copper etching ...Acetic acid, slow and tends to dissolve the ink. ... but evolves really nasty gases and can attack... Why should FeCl3 be environmentally unfriendly? ... (sci.chem)
Re: Copper acetate ... First, get a good-quality acetic acid, not just "distilled vinegar".... Then, take your copper sulphate in a large beaker, dissolve it in some ... (sci.chem)
Re: Copper acetate ... > Then, take your copper sulphate in a large beaker, dissolve it in some ... wash it with a lot of water on the filter.... When all Cu-carbonate dissolves, you can either filter ... (sci.chem)