markylee Posted June 30, 2018 Share Posted June 30, 2018 (edited) Popped along to Goodwood circuit today and noticed a Maclaren p1 in orange , then I noticed what looked like rust on the rear arch on looking closer the whole of the arch was bubbling, inspected the other arches and all the same , I am still shocked at what I saw. Edited June 30, 2018 by markylee (see edit history) Quote Link to comment Share on other sites More sharing options...
jamesmark Posted June 30, 2018 Share Posted June 30, 2018 Would doubt it would be rust, are they not all pure carbon fibre, no steel or alloy used in body panels apart from nuts and bolts and engine & running gear. (I think). More like a wrap gone wrong? Quote Link to comment Share on other sites More sharing options...
markylee Posted June 30, 2018 Author Share Posted June 30, 2018 (edited) Would doubt it would be rust, are they not all pure carbon fibre, no steel or alloy used in body panels apart from nuts and bolts and engine & running gear. (I think). More like a wrap gone wrong? That's what I thought but you could clearly see the ally was turning white with oxidation where the paint had peeled off it was very similar to certain parts of my engine bay lol....definately not a wrap you could clearly see the aluminium unless the carbon is coated with something resembling aluminium but I doubt it, maybe the lip itself is has a bonded ally strip for some reason also I am not that clued up with Maclarens so probably not a p1 probably a 570 so sorry for the misleading title. Edited June 30, 2018 by markylee (see edit history) Quote Link to comment Share on other sites More sharing options...
markylee Posted June 30, 2018 Author Share Posted June 30, 2018 Edited my heading as it was obviously not a p1 , but it was a still rusty Maclaren which I thought I would never see in my lifetime. Quote Link to comment Share on other sites More sharing options...
keron Posted July 1, 2018 Share Posted July 1, 2018 Mclaren has a big problem with the alloy panels oxidising /bubbling up on the edges.... A lot of manufacturers have the same issues recently.... Just like the supra bonnets and aero roofs if anyone’s seen that too Quote Link to comment Share on other sites More sharing options...
blythmrk Posted July 1, 2018 Share Posted July 1, 2018 My Audi rs4 b7 aluminium front wings had started to go on the inside of the lipstick the front wings so I removed the corrosion, painted and wax oiled them it’s a case of keeping on top of things as they get older Quote Link to comment Share on other sites More sharing options...
evinX Posted July 1, 2018 Share Posted July 1, 2018 Mclaren has a big problem with the alloy panels oxidising /bubbling up on the edges.... A lot of manufacturers have the same issues recently.... Just like the supra bonnets and aero roofs if anyone’s seen that too My bonnet had the alu bubbling in one corner and my roof has some small spots. Its the science of aluminium, when moisture gets to it, it forms a corroded surface to further protect itself. Really weird stuff. Quote Link to comment Share on other sites More sharing options...
jagman Posted July 1, 2018 Share Posted July 1, 2018 Very poor show from car manufactures , during build a simple coating brushed on the aluminium with alodine solution before painting and there endeth the corrosion problems - aircraft are aluminium skins and parked outside 99% of the time - they don't fall out of the sky with holes in the skin every day even at 40 or 50 years old ! Quote Link to comment Share on other sites More sharing options...
blythmrk Posted July 1, 2018 Share Posted July 1, 2018 Car manufactures don’t want cars too last too long I think they design them with a life expectancy now. Quote Link to comment Share on other sites More sharing options...
Scooter Posted July 3, 2018 Share Posted July 3, 2018 Aluminium won't perforate like steel as the oxide protects it or it certainly doesn't flake off like rust in big chunks exposing new steel to attack, but will effect paint/metal interfaces. If you think about it nearly all metals aren't found in their natural state (Gold is a notable exception!) and need to be extracted from ore, once this is done you are fighting entropy as they then want to revert back to the ore/oxidised state. Stainless steel 'works' because it has chromium in it, but it's the chromium oxides that it then forms on the surfaces that helps protect the underlying metal. Quote Link to comment Share on other sites More sharing options...
jagman Posted July 3, 2018 Share Posted July 3, 2018 Oh yes aluminium does perforate and flake , I've spent half my life checking for exactly that, lol - aircraft skins also have the added issues of Coca Cola,deicing fluids,urine,various chemicals,acids and alkalis , salt water (carrying things like fish) , and constant water - warm air inside and minus 50 degrees outside causes massive condensation which runs down to the bottom and to drains . That's why we use Alodine,etch primer,paint , alclad ,dinitrol and millions of man hours checking for corrosion Mercury is about the worst thing , a thermometer spill can cut through Ali like cheese ,salt water not far behind Quote Link to comment Share on other sites More sharing options...
SupraTRD_MK4 Posted July 3, 2018 Share Posted July 3, 2018 What the........Scooter Science class right here. Nice to know though. Quote Link to comment Share on other sites More sharing options...
jagman Posted July 3, 2018 Share Posted July 3, 2018 The flaking of aluminium is called exfoliation corrosion - once the surface is penetrated the corrosion spreads along the length just under the surface , it causes a visible bulging , eventually large chunks just fall off and it's like cheese underneath , soft and grey/white - coatings prevent this happening , clad aluminium and chemical conversion coatings like Alodine Quote Link to comment Share on other sites More sharing options...
azam Posted July 3, 2018 Share Posted July 3, 2018 From my experience I have never seen the body panels on the p1 rust, the other series McLaren's are different story but I have seen a bit of rust / bubbling on the p1 rear grills. I don't think manufacturers design with the intent for panels to rust or for a short life span as this would have a huge impact on warranty claims considering some manufacturers have 10 years perforation/corrosion warranty ( good for dealers to make money on doing the work but bad for the company profits ) Quote Link to comment Share on other sites More sharing options...
Scooter Posted July 8, 2018 Share Posted July 8, 2018 Jagman is obviously more knowledgeable about Ali in aerospace applications where let's face it corrosion can be life threatening. What I am saying is chuck an aluminium front crash bar in your garden and it won't rust/flake away like the rear crash bar will. Quote Link to comment Share on other sites More sharing options...
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