I don't think cars in the United Arab Emirates suffer a great deal of corrosion...
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I don't think cars in the United Arab Emirates suffer a great deal of corrosion...
The type of corrosion I was talking about does not need water, it only needs contact between the different metals. It corrodes metals/alloys that are usually known to be non rusting/corroding.Quote:
Originally Posted by Crasher
Since vw have used these different alloys, it's now become imperative to match fasteners that are designed for the job or create a barrier which prevents direct contact. This is what I have seen on the rear control arm bushes for example. They have to be brutally cut off after a few years in situ. Also seen it with other bits which have also attained a welded like state. Apparently it is dissimilar metal corrosion hence my fear of what the rate of corrosion would be using unknown fasteners since each reaction will be different.
Are you crasher from HJ, you helped me out loads about 15 years ago.
A great deal of the experienced members in these forums are well aware of the type of metallurgic reaction between the collars in the bushes and the steel TTY bolts. It is not the car manufacturer but the parts manufacturers. My barrier is thick copper grease which limits the fusion of the dissimilar metals. The rear control arms I cut off less than 6 months ago after removing the complete rear subframe took 8.5 tons of pressure to press out the fused bolt piece, but it DID press out so the bond is not like that of welding and not as permanent. Still a royal PITA though as it did mean subframe removal and the renewal of an additional 4 TTY bolts (the hat type). The new control arms had STEEL collars and therefore I would not expect the same reaction again, if the car is around in another 12 YEARS! But I still applied my copper grease barrier as these were the adjustable arms.Quote:
Originally Posted by Roverfan