 | Home > Maintenance & Modifications > Tips on fixing galvanic corrosion |
 
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| 90 Dreamer Member Since: 13 Jul 2019 Location: Oop North Posts: 2164   
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Looks pretty poor, what age is the truck if you dont mind me asking??
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17th Jul 2019 7:46pm |
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| mattc Member Since: 10 Apr 2019 Location: Cheshire Posts: 73 
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It's a 2005. The rest of it is in quite decent shape, so keen to get this sorted to tidy it up and prolong its lifespan.
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17th Jul 2019 7:47pm |
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| Oldowner Member Since: 26 Dec 2018 Location: South west Posts: 623 
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The body is only in primer at best behind the cappings. So to do properly you need to remove the cappings and have them shot blasted and hot zinc sprayed, and whilst that is being done paint the unpainted portions of the body which were hidden by the cappings.
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17th Jul 2019 7:59pm |
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| CharlieDonuts Member Since: 16 Jun 2019 Location: Illiers Combray Posts: 133  
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I have the same issue on my rain gutters and around the quarter lights. I want to clean it up before fitting a roof tent. Do I clean it back to bare metal, prime with a zinc primer and respray. I only wash the 90 once a year and I will respray the roof matt black. So it needs to be done as to not come back but I don’t need a fancy paint job.
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18th Jul 2019 8:17am |
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| boxoftricks Member Since: 06 Feb 2019 Location: Home Counties Posts: 747 
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Back to bare metal, zinc primer and then paint is how the bodyshop would do it. You may like to use a high build primer between the zinc and paint. Build up a few coats to knock back to get a nice smooth finish.
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18th Jul 2019 11:04am |
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| Green Machine Member Since: 19 Nov 2010 Location: North Yorkshire Posts: 1226 
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As oldowner says, the only way to properly resolve it is to lift the roof / body sides off the tub and then drill out the rivets and remove the cappings.
I went through this exact process on my 2005 90 with a local bodyshop a couple of years ago. Replaced the tub cappings, the rear corner cappings and the lamp panels. Mine were all pretty far gone to be honest, so I replaced all with new. The key is to make sure everything is fully painted before reassembly - doing as much as possible to make sure there is a good separating layer of paint between all the elements. I then got the bodyshop to seal the edges of the cappings with black automotive sealant, which hopefully prevents any water getting in behind there. They also ran a bead of black sealant along the top of the cappings in the gap between the body side and the top edge of the capping. There is an argument to replace with galvanised cappings (or have your existing cappings galvanised if they're good enough). In the end I decided against this as I was advised that the paint finish on galvanising would never be as good as on bare metal (no matter what the prep) and there was a risk of the cappings warping when galvanised and not fitting properly. But you can always use a zinc-rich primer as a compromise. Like anything with paintwork it all comes down to the thoroughness of the individual who actually does it! I haven't been totally impressed with the work I had done - it is already starting to show the early signs of corrosion again around the rear corner cappings. But mine doesn't get cleaned very often and is used through the winter with the huge amount of salt we get on the roads round here. It's also parked outside and not garaged. So the odds are stacked against it from a corrosion point of view! Final point is to used sealed / closed rivets in re-fitting everything, so water can't track through the rivet itself. Basically seal and isolate everything as much as possible! Good luck!  2005 Td5 | 90 Station Wagon | Tonga Green |
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18th Jul 2019 12:10pm |
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| mattc Member Since: 10 Apr 2019 Location: Cheshire Posts: 73
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That's really useful to know. Thanks everyone. Definitely beyond my skills so I'll be looking to find a specialist to tackle it for me. Can anyone recommend anyone in Cheshire or surrounding counties, please?
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18th Jul 2019 12:19pm |
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| Oldowner Member Since: 26 Dec 2018 Location: South west Posts: 623
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If you have them hot zinc sprayed it is pretty much as good as galvanising and none of the above issues. I have a series bulkhead I had hot zinc sprayed in early 2000s and no rust on it despite it being parked 10m from the sea. |
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18th Jul 2019 5:34pm |
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| Scotm Member Since: 28 Feb 2014 Location: Aberdeenshire Posts: 666  
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If you get all the parts sprayed it isn't a difficult job to do yourself. Just a little time consuming. I did my previous 110 myself on the drive.
 Click image to enlarge |
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18th Jul 2019 9:48pm |
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| roel Member Since: 08 Aug 2009 Location: Lelystad Posts: 2039  
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Corrosion on the alu panels has to be removed completely otherwise it comes back very soon.
My 2003 90 started life as a farmers pick-up, the advantage off that is that the cappings are galvanised and painted not just painted. I took the paint off as I like the old style look. Click image to enlarge Roel 1984 90 2.5 na Diesel - RR V8 (1994-2001) 1997 Camel Trophy Discovery 300TDI (2001-2009) 2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts. 2003 90 Td5 (2009-now) |
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19th Jul 2019 11:32am |
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| CharlieDonuts Member Since: 16 Jun 2019 Location: Illiers Combray Posts: 133
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Frankly only a Land Rover owner could take a photo like this. The ingenuity alone ! My mechanic mate's, best mate, who is the guvnor at the local body shop, says he can clean, prime and blow my roof in matt black for 350 euros, just have to wait for the summer holidays to be over. Good'o. |
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20th Jul 2019 11:38am |
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| mattc Member Since: 10 Apr 2019 Location: Cheshire Posts: 73
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As this work is a significant step above my skills, I've been looking for a specialist. I have to admit, I haven't a clue what sort of price is reasonable, but was surprised at the first quote received. This was to replace the RHS tub capping, replace the rear quarter cappings, tidy a couple of dents and then spray it all black.
Obviously, removing the roof and sides is a fair bit of work! Any suggestions on who to try for a cheaper quote, or advice on whether this is realistic, please? Thanks! |
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22nd Jul 2019 1:36pm |
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| JOW240725 Member Since: 04 May 2015 Location: Suffolk Posts: 7906 
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If you were closer to Suffolk/Essex I'd highly recommend Hangar 53 for this sort of work. There is CSK in Hoddeston. But in your area I would recommend having a look at Carriages Auto Services Ltd, Manchester or 4x4 Fabrications, Wrexham? James
MY2012 110 2.2TDCi XS SW Orkney Grey - http://www.defender2.net/forum/topic43410.html MY1990 110 200TDi SW beautifully faded Portofino Red - https://www.defender2.net/forum/post743641.html#743641 MY1984 90 V8 Slate Grey - https://www.defender2.net/forum/post744557.html#744557 Instagram @suffolk_rovers |
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22nd Jul 2019 2:53pm |
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| mattc Member Since: 10 Apr 2019 Location: Cheshire Posts: 73
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Many thanks, James! I'll give them a try.
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22nd Jul 2019 2:54pm |
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