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PostPosted: Tue May 23, 2017 10:31 am 
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Joined: Thu Sep 23, 2010 5:47 pm
Posts: 107
The paint is falling off all round the aluminium cable entrances on a carbon Bianchi Infinito, exposing significant corrosion. Is the frame a write off?


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PostPosted: Tue May 23, 2017 1:51 pm 
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Joined: Tue Jan 13, 2009 2:35 am
Posts: 773
Probably not.

I had a Cannondale System 6. There was a ton of corrosion where the carbon and aluminum tubing met at the BB. I rode it for several years like that, with the corrosion continually worsening. It was still going strong after 8 years, until I got hit by a car.


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Posted: Tue May 23, 2017 1:51 pm 


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PostPosted: Tue May 23, 2017 2:16 pm 
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Joined: Fri Dec 24, 2010 9:37 pm
Posts: 1360
Location: it's raining, it must be uk
pictures?

unless the cf has been damaged (al corrosion product takes up more volume) it should be ok

cf/al interface can suffer from galvanic corrosion if moisture gets in, the al loses

you can apply some acf-50 to treat the corrosion and held prevent it worsening, re-apply every year or so, more often if it's ridden in wet weather a lot


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PostPosted: Tue May 23, 2017 2:31 pm 
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Attachment:
bianchi.jpg
bianchi.jpg [ 79.23 KiB | Viewed 640 times ]
[img]


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PostPosted: Tue May 23, 2017 2:36 pm 
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Joined: Thu Sep 23, 2010 5:47 pm
Posts: 107
Hopefully you can see the picture Ive posted. I have a feeling the gear cable ports will do the same judging by the cracking.

I now notice there is probably corrosion round the BB and the paint is bubbling round the rear drop outs.


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PostPosted: Tue May 23, 2017 2:48 pm 
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Posts: 4770
Are you the original owner? If so, I would see what Bianchi might do for you, regardless of whether it's still under warranty or not.

_________________
Colnago C60 - PR99
C59 Five Years Later
My Special Colnago EPQ
Trek Emonda SL Campagnolo SR


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Posted: Tue May 23, 2017 2:48 pm 


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PostPosted: Wed May 24, 2017 1:19 am 
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Joined: Tue Jul 01, 2014 9:12 pm
Posts: 51
Location: Pacific Northwest, USA
I had similar galvanic corrosion on the rear dropout of my Colnago C40. In that case, with the corrosion affecting structural integrity of the frame, I had to have the dropout replaced with a new steel hangar. Not cheap, but the frame was much improved. In your case, this aluminum cable guide/insert is not structural...you can probably treat it as described above and then continue to enjoy the frame for years.

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Road: Colnago C50
Cross: Ridley X-Fire
Tri:Trek SC 9.8


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