Message:

<p>[QUOTE=&quot;afantiques, post: 25909, member: 25&quot;]<i>Its hard to believe that once aluminum was considered more precious than gold in the mid 1800&#039;s?</i></p><p><br /></p><p>It takes a lot of electrical energy to refine the metal from the oxide, so early refining would be quite an expensive feat.</p><p><br /></p><p>In use, aluminium saucepans become &#039;passivated&#039; by a layer of inert alumia, aluminium oxide. You&#039;d need to polish them daily to have naked metal exposed. Same effect with lead pipes that become coated with inert lead carbonates and sulphates.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in