Subscribe to Make Magazine Today!

If you’d like to take a crack at anodizing your titanium camping gear, try submerging it in Coca-Cola and running 20v-100v through across it. This can be achieved using 9v batteries and a little patience. Depending on the voltage applied, you can transition between Bronze, Blue, Light blue, Yellowish, Purple, Cyan, and Green. [via hackaday]

Adam Flaherty

Adam Flaherty

I make cool stuff and write about other people making cool stuff on If you have something you think I should see, send me a tip.

  • David Livingston

    Interesting technique, but I must correct an error. One does not “run” voltage “through” anything. Voltage – across, current – through.

    • Adam Flaherty

      Thanks for pointing that out, David!

  • Jeanne Cermak

    I recognize that titanium spork! :)

    • muttnik

      Yes, that spork does look familiar! And it’s a thing of beauty, isn’t it.

  • Shotgunner

    ummm… plain ole salt water works. You just need ions to make the water conductive.

    The concept of daisy chained 9 volt batteries is clever and doable by everyone.

  • watermark

    Can this be done with other metals, like Aluminum?

  • Quora

    Why do lots of bubbles appear when I pour coca-cola into a Titanium cup?…

    Coca cola foams more when it touches materials which are: 1. Surfactants, decreasing the surface tension of the bubbles (that’s what happens with Mentos). 2. Rough or porous, because of the high specific surface (that’s why ice cubes make coke foam)….

blog comments powered by Disqus

Related Supplies at Maker Shed