Tommy P
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| posted on 11/12/07 at 07:20 AM |
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Electrolitic action
I'm guessing it's been asked before, but here goes.
Does electrolitic action effect kit cars, where the aluminium rivits fix panels to the steel chassis?
Is it worth considering ways to prevent this, or is it not worth bothering about?
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RazMan
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| posted on 11/12/07 at 08:04 AM |
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Electrolytic corrosion can be a problem over a long period of time - just look at some old Landrovers and you can see the sort of damage that can
happen.
You can minimise any danger of it happening by applying PU adhesive (and rivets) to alloy panels over a well powder coated chassis. That should help
anyway.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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02GF74
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| posted on 11/12/07 at 08:32 AM |
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bear in mind old land rovers can be up to 50 years old ..... and are made from aluminium alloy called Birmabright whcih may or may not be worse that
the sheeting used for panels.
aluminium and its alloys will to some extent corrode if in contact with steel, apparently stainless steel/aluminium is worse.
I don't think there has been a post here yet where the panels/rivets have given way ....
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Mr Whippy
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| posted on 11/12/07 at 08:37 AM |
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having restored a few landys, I've not really seen the rivets going into steel corrode, but where a part is thin and can flex (like a body
support flange) it turns to dust in no time. Dipping the rivets into PVA glue sounds a good idea so long as it's waterproof.
I doubt these cars will see the kind of weather that sets off the corrosion anyway.
[Edited on 11/12/07 by Mr Whippy]
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James
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| posted on 11/12/07 at 12:17 PM |
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I dipped my rivets in silicon bath sealant before popping them in.
Whether I'll have the car or it'll have the same body panels by the time corrosion may be a problem is somewhat in doubt....
... I bust bought that new set of snips for a reason! 
Cheers,
James
------------------------------------------------------------------------------------------------------------
"The fight is won or lost far away from witnesses, behind the lines, in the gym and out there on the road, long before I dance under those lights."
- Muhammad Ali
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Tommy P
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| posted on 12/12/07 at 09:11 AM |
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I'll dip em in a bit of pva then.
Cheers
[Edited on 12/12/07 by Tommy P]
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RazMan
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| posted on 12/12/07 at 09:31 PM |
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Erm, isn't PVA water soluble? PU adhesive would be better, or even silicone sealer.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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Tommy P
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| posted on 13/12/07 at 09:01 AM |
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Yes PVA is water soluable, so I guess silicone would be better.
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iank
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| posted on 13/12/07 at 10:22 AM |
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quote:
Originally posted by James
I dipped my rivets in silicon bath sealant before popping them in.
...
Cheers,
James
Ummm, that vinegar small you get from silicone bath sealant is acetic acid.
http://yarchive.net/electr/silicone_sealant_corrosiveness.html
PU is the one to use (and it's a decent glue rather than a sealant - wear gloves  ).
[Edited on 13/12/07 by iank]
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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Tommy P
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| posted on 13/12/07 at 10:32 AM |
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Mmmm... thats an interesting little article and helps in considering other applications.
Cheers
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