I was talking about electroplating.

It's just one of them chem class experiments.

Get a couple of alligator clips (like BFN), a salt solution (ionic solution), battery, some solid metal medium (in this case titanium), and another solid medium (aluminum).

What your basically going to do is added a very small layer of oxide coating. You going to run a current from a battery from the salt solution to the titanium. You need another material to keep the cycle going, foil.

One alligator clip will be attached to the titanium, which will also be in the salt solution. The other clip will be attached to the foil or metal. Which will also be in the ionic solution.

Next is the most annoying part. Getting the cathode and anode right. I just do trial and error. <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" /> The ends of the alligator clips will be attached to either the + or - end of the battery. If you think about the flow of electrons it will make sense. Titanium is getting oxidized and will lose electrons. Electrons flow to positive, therefore connect clip to the positive end. The foil at the negative end. Always think what material is going to get oxidized. It will make sense. <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />

The coating itself can be determined by the voltage that you use. Lower voltage will give you a lower oxide coating build up. More voltage, higher oxide build up and different color. But, after a certain amount of voltage the colors will actually cycle.

Try it your self, EMF.