View Full Version : Nokia N8: Anodised Aluminium

01-11-2010, 07:38 PM
Hi all, we all know the new Nokia n8 is crafted of anodised aluminium, i was not sure what this was, i mean i know what aluminium is but wasn't sure of the process, so here goes, this is how our N8's body is made:

Many metals are structurally weakened by the oxidation process, but not aluminum. Aluminum can actually be made stronger and more durable through a process called 'anodizing'. Anodizing involves placing a sheet of aluminum into a chemical acid bath, quite often acetone in laboratory experiments. The sheet of aluminum becomes the positive anode of a chemical battery and the acid bath becomes the negative. An electric current passes through the acid, causing the surface of the aluminum to oxidize (essentially rust). The oxidized aluminum forms a strong coating as it replaces the original aluminum on the surface. The result is an extremely hard substance called anodized aluminum.

Anodized aluminum can be nearly as hard as diamond under the right anodizing process. Many modern buildings use anodized aluminum in places where the metal framework is exposed to the elements. Anodized aluminum is also a popular material for making high-end cookware such as frying pans and pots. Heat is distributed evenly across anodized aluminum, and the process of anodizing provides a naturally protective finish. It is possible to use another electroplating process to make anodized aluminum look like copper or brass or other metals. Special dyes can also be used to color the anodized aluminum for decorative uses.

Because of its strength and durability, anodized aluminum is also used in a number of other applications. Many of the satellites circling the Earth are protected from space debris by layers of anodized aluminum. The automobile industry relies heavily on anodized aluminum for trims and protective housings for exposed parts. Furniture designers often use anodized aluminum as the framework for outdoor pieces as well as the base metal for lamps and other decorative items. Modern home appliances and computer systems (and the N8 :D ) may utilize anodized aluminum as protective housing.

Anodized aluminum may not be appropriate for all applications because of its non-conductive nature. Unlike other metals such as iron, the oxidation process doesn't seem to weaken aluminum. The layer of 'aluminum rust' is still part of the original aluminum and will not transfer to food or easily flake off under stress. This makes it especially popular for food-service applications and industrial applications where durability is crucial.

So the Nokia N8's Anodized Aluminum body should survive under every day conditions and then some.


02-11-2010, 01:30 AM
"Special dyes can also be used to color the anodized aluminum for decorative uses."

hopefully the colors on our N8s are 'special dyes'!

03-11-2010, 10:29 AM
I dropped mine in the car park, tried the old foot catch but failed... the casing actually did very well with just a couple of tiny dints where the corner entered the tarmac :(

Its the dark grey version too and the metal showing thru was same colour.

06-11-2010, 12:28 PM
i dropped mine as well really hard, and it was silver underneath the black :( but yea the case itself is pretty durable

08-11-2010, 07:10 AM
Time to try cutting my wife's diamond with my N8.
Will tell her Symbian the pirate did it.

Iphone also use anodised aluminium?