refurbishment and anodizing of cranks

[Henryfeather]

Hi Guys do any of you know who would refurb and anodize aluminium????

[Malpiet]

If you in cape town then cape anodizing

[CAAD4]

Crank arms yes, but the shaft might disintegrate in the acid bath. The guys who did my parts refused to do mine, as another had literally disappeared in the acid. It seems alu is fine, but not steel?

[brad890]

Depends what finish you wanting.

 

If you want a raw polished look and happy to give it a go yourself you could do the following.

 

1. remove old anodizing, spray with a coat of oven cleaner, place in a plastic bag for 20-30 min.

 

2. Rinse off with water and neutralize with vinegar (will turn crank black due to reaction, don't be too concerned polishes off quite well)

 

3. polish with a high grit water sand paper 1000 plus.

 

Did this myself a few years ago, not sure how it would affect tolerances if it is a crank that requires a very precise fit between crank arm and shaft. Also would not recommend if any carbon is involved.

 

http://www.instructables.com/id/Removing-Anodizing-From-Aluminum-Quickly-and-Easil/?ALLSTEPS

[Henryfeather]

Great thank you guys

[JXV]

Crank arms yes, but the shaft might disintegrate in the acid bath. The guys who did my parts refused to do mine, as another had literally disappeared in the acid. It seems alu is fine, but not steel?

Putting dissimilar joined metals in an acid bath is no different to a battery with a built-in short circuit. The crank will eat itself.

 

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[V12man]

Take it to Bogus and get him to paint it

[Fire Engine]

Astro anodizing in sebenza but if it has steel inserts it might be a problem

[WIPEOUT 1000]

I wonder if it is possible to coat the exposed steel with a coating of sorts (e.g. some kind of wax) in order to prevent the galvanic reaction?

[JXV]

I wonder if it is possible to coat the exposed steel with a coating of sorts (e.g. some kind of wax) in order to prevent the galvanic reaction?

If any acid gets into the interface between the pressed-in inserts it will continue to do evil for a long time as it is not easy to flush tiny crevices. You would have to ensure that coating does not get nicked or scratched and that the acid can't tunnel underneath it (because it can).

 

Rather sand to raw and polish or paint. Then coat with VPS or similar film.

 

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[Kalahari Vegmot]

Okay, here's what I did to my Veloce cranks last week as I really like shiny things, and let's be honest-anodizing sucks. Removing it will however leave the aluminium exposed, so you'll have to polish and clean it fairly regularly(Probably about once a month) to keep the shine; all worth it in the end if you ask me though:-)

 

So, here's how I did it:

First, remove the anodizing by spraying it generously with oven cleaner and letting it do its work for about 40-60 minutes-this time varies from cleaner to cleaner, so do some research first, or like me, TRIAL AND ERROR-and scrub the piece with some steel wool to make sure all the anodizing is removed.

 

Before removing anodizing:

 

During the removal process:

 

After the anodizing's been stripped:

 

Next I took some buffing compound and a wheel and buffed it to a mirror-shine with relatively little effort; you could just skip the whole oven cleaner-removal process and just polish the anofizing off, but it is VERY time-consuming, and you just can't get it polished in all the nooks and crannies-believe me, I tried

 

And finally, the finished piece:

 

The whole shebang probably took me around 3 hours to complete with all my trial and error, but it is sooooooo worth it at the end

[Henryfeather]

Wow it looks amazing

[Eugene]

I want to do the same to my shifters, but, I don't want the mirror finish. What is the best way to avoid this.

[V12man]

Okay, here's what I did to my Veloce cranks last week as I really like shiny things, and let's be honest-anodizing sucks. Removing it will however leave the aluminium exposed, so you'll have to polish and clean it fairly regularly(Probably about once a month) to keep the shine; all worth it in the end if you ask me though:-)

 

So, here's how I did it:

First, remove the anodizing by spraying it generously with oven cleaner and letting it do its work for about 40-60 minutes-this time varies from cleaner to cleaner, so do some research first, or like me, TRIAL AND ERROR-and scrub the piece with some steel wool to make sure all the anodizing is removed.

 

Before removing anodizing:

20161107_100313-1.jpg

 

During the removal process:

20161107_101812-1.jpg

 

After the anodizing's been stripped:

20161107_100313-1.jpg

 

Next I took some buffing compound and a wheel and buffed it to a mirror-shine with relatively little effort; you could just skip the whole oven cleaner-removal process and just polish the anofizing off, but it is VERY time-consuming, and you just can't get it polished in all the nooks and crannies-believe me, I tried

 

And finally, the finished piece:

DSCN9929.JPG

 

The whole shebang probably took me around 3 hours to complete with all my trial and error, but it is sooooooo worth it at the end

Now clear coat them and you won't have to Polish them...

[Kalahari Vegmot]

Now look me in the eye and tell me that's not beautiful!

These will be for sale shortly-with chainrings and BB obviously.(Can't mix campy and shimano...)

[Eddy Gordo]

Nice job. Did you seal it with a clear coat?