Home > General & Technical (L663) > Aluminum and Steel - galvanic corrosion issues? |
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LR Nuts Member Since: 10 Aug 2022 Location: UK Posts: 1087 |
all you say is very familiar.
I do remember LR having a problem with the Discovery 2. |
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1st Aug 2024 3:12pm |
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stingray Member Since: 22 Apr 2012 Location: North Wales Posts: 98 |
My nephew, Mark Beaumont, has developed an excellent product which should help tremendously with corrosion issues of the type that you have mentioned. It is called 'Lanoguard'. If you google that name, you will soon see what I mean.
Not sure if it is available in the US though. Hope that helps. Ray |
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1st Aug 2024 8:13pm |
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H1Tad Member Since: 20 Jul 2024 Location: Maine Posts: 110 |
Thanks for the recommendation - we have a plethora of available corrosion inhibitors here. I get my rigs treated with something called "NH oil" which is a sticky thick black oil that essentially encapsulates metal and protects it against the elements. Makes working on the underside a terrible mess however.
Unfortunately corrosion inhibitors don't do much do stop galvanic corrosion as the chemical differences between dissimilar metals causes a reduction (or oxidation, I can't remember which) with the mere presence of moisture. 2022 Defender 110 SE P400 Tasman Blue Expedition and Cold weather package 2003 Hummer H1 P400 Firehouse Red 2008 Toyota FJ Cruiser |
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2nd Aug 2024 9:39pm |
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BadgerWaz Member Since: 15 Jul 2024 Location: Linconshire Posts: 57 |
For galvanic corrosion to take place you are correct in stating that you need a liquid for the chemical reaction to take place with any real severity.
I'd have thought if you undersealed all of the vehicle to protect it from moisture you'd certianly delay the process. It may be something LR have prepared for and used non-conductive materials as insulators, or that it'll take decades to take hold so they don't really care I think Audi have issues like this, but on 20 year old cars so we're safe for now. I'd worry more about the road salt...... |
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2nd Aug 2024 10:12pm |
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H1Tad Member Since: 20 Jul 2024 Location: Maine Posts: 110 |
That's indeed what I was hoping for. I was just curious if anyone has experienced it yet. And yes, encapsulating the metal is a way to slow it down, but it can never be completely eliminated. Water displacement (using oils) is about as good as you can get. 2022 Defender 110 SE P400 Tasman Blue Expedition and Cold weather package 2003 Hummer H1 P400 Firehouse Red 2008 Toyota FJ Cruiser |
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3rd Aug 2024 1:44pm |
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Bluest Member Since: 23 Apr 2016 Location: Lancashire Posts: 4196 |
Out of interest, which bits of the L663 are aluminium? 2007 110 TDCi Station Wagon XS
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3rd Aug 2024 2:14pm |
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J77 Member Since: 04 Nov 2019 Location: Fife Posts: 3387 |
I thought most of it was aluminium. The body structure definitely is, the roof is, I always thought doors were also aluminium. Need to get the magnet out. 24MY 90 D250 HSE, Tasman Blue
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3rd Aug 2024 2:45pm |
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Philm Member Since: 19 Jun 2020 Location: Manchester Posts: 168 |
all doors and wings are steel
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3rd Aug 2024 3:30pm |
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BrickBox Member Since: 05 Oct 2021 Location: Wales Posts: 802 |
This is madness, if true..!
I thought this was just posted in the wrong section for the classic defender..! I did not expect to be reading this about the new one..! 2008 2.4 110 Utility Station Wagon XS. |
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3rd Aug 2024 3:35pm |
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nebc100 Member Since: 07 Nov 2023 Location: Altlinster Posts: 88 |
Tested… Philm is correct… wings and doors are steel
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4th Aug 2024 8:27am |
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lightning Member Since: 23 Apr 2009 Location: High Peak, Derbyshire Posts: 2707 |
Corrosion isn't the issue that it used to be.
l visited the factory in Liverpool where they make the Evoque and Discovery Sport. Watching the robots assemble the doors was captivating and l was left behind by the tour group! Eventually someone came back to find me. l would have had no idea where to go as the factory was huge. Anyhow, there was a robot that applied a sealant between the door skin and frame before they were put together, presumably to inhibit the corrosion mentioned above. When did you last see a modern Land Rover product with rust coming through at the bottom of the doors? |
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8th Aug 2024 8:33am |
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stevemfr Member Since: 18 Sep 2022 Location: Strasbpurg Posts: 137 |
Exactly this ^^^
Galvanic corrosion is an issue where dissimilar metals are fastened to one another - especially if water can creep into these joints. Examples were an aluminum door skin folded over a steel door frame at the edges. Or a long, flat flange where steel and aluminum were riveted or bolted together. The mounting flanges the wings on a classic RR spring to mind as I still have 2 of these (RRs, not flanges ;-p). Simply having a steel door or bonnet on an aluminum body will hardly caused galvanic corrosion. With the door seals or bonnet bumpers, there are practically no points of contact between these bits and the body. Hinges, catches and for that matter all manner of parts bolted to the aluminum structure are theoretically a different story. But materials and paints have improved so much over the last years. I seriously would NOT worry. Aside from all of that, people are acting completely surprised by all of this; Land Rover never stopped using aluminum (save, possibly, for the lower end models such as the Freelander though I'd have to check). My L322 RRs are more or less exactly the opposite of the L663: aluminum doors, wings and bonnet on a steel unibody. RRC 2Dr, RRC 4Dr, P38, and 2 L322s, 2 FL1s and a L663 on the way |
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8th Aug 2024 10:30am |
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H1Tad Member Since: 20 Jul 2024 Location: Maine Posts: 110 |
This is the first LR I've ever owned, and I haven't made it a point to crawl up under other peoples' cars But it sounds like they were prudent when using the two materials together. 2022 Defender 110 SE P400 Tasman Blue Expedition and Cold weather package 2003 Hummer H1 P400 Firehouse Red 2008 Toyota FJ Cruiser |
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8th Aug 2024 11:41am |
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