I tuned an AX-lightness Europa... using Coke. (Really!)

Back by popular demand, the general all-things Road forum!

Moderator: robbosmans

Posts: 79
Joined: Mon May 04, 2009 9:21 pm

by ephedyn

Firstly, I'm not paid by F&N Coca Cola. In fact, I don't drink coke. Secondly, if you were misled by this topic, this is actually a tutorial on DIY anodizing for $6. The full story is at my website (http://www.ephedyn.com), but I decided to put a summary here anyway.

I was changing the bolts on my AX seatpost to aluminium, so I decided to experiment with the original bolts, since I knew they were made of titanium. I only used 6 items to set up the anodizing apparatus:

(left to right) Takeaway fishball noodle soup, alligator clips, wire

(left to right) Power supply (can use batteries instead), aluminium foil, regular coke

You need to minimize contact between the clip and the bolt, so this was how I did it.

Here you can see the setup, more or less. The +ve wire goes to the bolt, and the -ve wire goes to the aluminium foil. I did it wrongly in this picture so the coke just fizzled around the bolt without anything happening. But if set up correctly, the bolt changes to a nice color after about 1 minute dipped inside the coke. The bolt and the foil mustn't touch, but aluminium foil floats very easily, so it's best to make a small square section of the foil and tape it to the side of the container. I applied 24V which gives it a blue coloration. Other possible colors (that's why there's no anodized black titanium):


Compare the anodized bolt with an original:
Higher resolution: http://4.bp.blogspot.com/_j0vYt68oRrA/S1gvGyFK61I/AAAAAAAAAgk/vb7A9b3n1dk/s1600-h/P1040700.JPG

Oh, and it's the same if you use coke light... no difference here for weightweenies. The reason why this works is because of the high phosphoric acid content in coke. The difference between diet versions of coke and regular coke is that they use a protein sweetener, or less sugar, instead. So, enjoy your fishball noodles and coke :beerchug: as you anodize your parts!
Last edited by ephedyn on Thu Jan 21, 2010 12:23 pm, edited 1 time in total.

by Weenie

Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓    Broad Selection ✓    Worldwide Delivery ✓


User avatar
Posts: 8577
Joined: Wed Oct 31, 2007 10:32 pm
Location: Glendale / Los Angeles, California

by prendrefeu


Exp001 || Other projects in the works.

User avatar
Giant DK
Posts: 1324
Joined: Mon Jan 23, 2006 3:03 pm
Location: Denmark

by Giant DK

Wow :shock: True spirit of WW!
Technical editor at Cykelmagasinet Denmark

My Simplon Pavo II

Posts: 1117
Joined: Thu Feb 05, 2009 12:04 am
Location: Gold Coast, QLD, Australia

by Murphs

This is probably the coolest thing i've ever seen...

User avatar
Posts: 128
Joined: Wed Oct 14, 2009 6:01 pm
Location: UK

by paddy

brilliant! :beerchug:

Look 585 2008, Campag Record 2008, Campag Shamal
Enigma titanium Esprit 2009, Campag Chorus / Record mix 2007, Campag Zonda
Kinesis Alu Racelight T 2009, Campag Centaur 2006, Ambrosio Excellight 28/32 handbuilts

Posts: 79
Joined: Mon May 04, 2009 9:21 pm

by ephedyn

:wink: Thanks for the compliments.

Just a note to add. You need to use a dye for anodizing aluminium - probably not worth it to do it on your own. It's a little more complicated than for titanium. And you can 'anodize' titanium using a blowtorch too.

User avatar
Posts: 496
Joined: Mon Jan 30, 2006 8:20 pm

by Rasmus

I need to sticky this. Excellent post.
- Papa R. Fresh

User avatar
Posts: 2904
Joined: Sat Jan 03, 2009 9:43 pm
Location: Canada

by devinci

yeah this deserves sticky, a DIY sticky or something like that.

you a genius man!!

User avatar
Posts: 101
Joined: Fri Feb 13, 2009 1:51 am

by xurde

:shock: no words

Any supermarket way to anodize aluminium??

Posts: 86
Joined: Wed Oct 01, 2008 7:00 am
Location: bay area, CA

by daryl1

Great tutorial! I'd also be interested to see how aluminum is done!

Posts: 211
Joined: Mon Dec 20, 2004 2:07 pm
Location: New Jersey

by climbingcue

Very cool, thank you for posting... I would need tons of coke to do my entire bike frame...

User avatar
Posts: 2213
Joined: Tue Feb 05, 2008 7:08 am
Location: Seattle ZOO - AfterReceivingComplaints, MyAvatarIsNowChanged. IGiveYouMySexyMug.

by TheBugMan

Very nice ephedyn :no1:
CLICK HERE to see my weenie

Click THIS to hear what happens when I see your and my weenie.

User avatar
Posts: 1049
Joined: Mon May 31, 2004 11:01 pm
Location: Germany

by pk0r

Great job there ephedyn!
You aren't by chance considering to apply for a job with us. :wink: :twisted:

Really nicely done - chapeau!!
(We have been considering to be offering the head elements in different colors as well just recently (...))
| http://www.ax-lightness.de |
| pk0r.com | "I respect the work in coloring parts but the result is stupid-monkey in silk clothes is still monkey." |

by Weenie

Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓    Broad Selection ✓    Worldwide Delivery ✓


Post Reply