corrosion on Fiat alloy wheels (1 Viewer)

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Jul 22, 2017
258
406
Cornwall
Funster No
49,570
MH
C Class
Exp
1992
I wonder if anyone had experienced with corrosion inside their 16"Fiat alloy wheels caused by the puncture protection fluid? When I bought my new van 4 years ago I was offered to have some puncture protection fluid put inside the wheels. In less than 4 years I had 2 wheels leaking around 3mm behind the valve.
The valves are brass and react with the alloy being help by the fluid. Same problem you find on sailing boats.After cleaning all the wheels I found deep pitting around the valves. Can't understand why they use brass valves...
 

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stevewagner

LIFE MEMBER
May 14, 2013
1,894
4,269
Pevensey Bay
Funster No
26,004
MH
Carthago Compactline
Exp
Yonks
I’ve never really warmed to the idea of this due to that reason. I would say in this instance whatever gunk they’ve used is not fit for purpose and therefore a latent defect. I would go back to the company as those wheels can no longer be safe.
 
Apr 22, 2018
6,888
12,719
Herts.
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53,503
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Adria Coral lowline
I question if the sealant does the damage as thousands of mountain bikers run puncture sealant in alloy wheels, including myself, with out any corrosion problems, and assume the sealant would basically be the same stuff.

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OP
OP
Nyvern
Jul 22, 2017
258
406
Cornwall
Funster No
49,570
MH
C Class
Exp
1992
I don't know what make of sealant they used as it was put into the wheels before I collect the new van.
 
Sep 26, 2013
4,192
5,198
Market Rasen
Funster No
28,295
MH
Self Build
Exp
Since 2003
I had alloy wheels on a van a few years ago and one of the steel valves broke off while in Germany due to corrosion.
 
Sep 24, 2013
1,325
763
Norwich
Funster No
28,255
MH
Carthago A class
Exp
Since 2014
So what sort of metal valve should be fitted? Just about to get one of mine replaced.
 
Sep 17, 2017
5,747
10,781
Birmingham, UK
Funster No
50,575
MH
A-Class
Exp
2017
So the issue is metal valves in an aluminium alloy rim and the sealant is the effectively a nice ionic liquid to allow bi-metallic corrosion to take place.

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OP
OP
Nyvern
Jul 22, 2017
258
406
Cornwall
Funster No
49,570
MH
C Class
Exp
1992
same valves used on car alloy wheels. Steel rubber coated should be acceptable I guess
 
Jul 28, 2021
1,630
12,951
British South West Somerset
Funster No
83,033
MH
Rapido Dreamer PVC
Exp
Minimal
It's rather like the galvanic corrosion my ally bodied Landy S2a has with it's steel chassis. Nevertheless they have still not been parted since 1963, but it's there!
 

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