Rust on the sunroof, and sunroof only. Metal experts??/

passat TS passat_ts at hotmail.com
Thu Oct 31 15:45:00 EST 2002


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Alan,

That's what I thougth, since it is localized. I'll get the washers.

The bad part is that I also used SS on the vent, so it makes 20 bolts
combined. The roof is easy, but the vent requires some knuckles' blood, since
I cut as little metal as possible.

Thanks,

Carlos.
>From: Alan Pritchard
>To: 'passat TS' , quattro at audifans.com
>Subject: RE: Rust on the sunroof, and sunroof only. Metal experts??/
>Date: Thu, 31 Oct 2002 15:21:15 -0000
>
>Stainless bolts on your sunroof would cause this, although a decent layer of
>paint should stop this, we make remote controlled submersibles and in any
>instance of different metals (ie in your case stainless, steel and zinc
>galvanizing) we try and insulate between the different parts, usually the
>best approach is to use nylon washers, or don't use stainless!!! Steel is
>much more forgiving but of course it will rust itself.
>-----Original Message-----
>From: passat TS [mailto:passat_ts at hotmail.com]
>Sent: Thursday, October 31, 2002 1:08 PM
>To: quattro at audifans.com
>Subject: Rust on the sunroof, and sunroof only. Metal experts??/
>
>[ Converted text/html to text/plain ]
>
>I have my CGT's sunroof firmly bolted with 10 SS 1/4" bolts, and two weeks
>ago
>I cut it to put a vent (this is a rally car).
>
>While cutting, I noticed that the sun roof has several small dots of rust,
>but
>the rest of the roof doesn't, neither anywhere else in the car.
>
>Is this some kind of metal reaction to the SS bolts? What to do on this
>case?
>
>Is this something similar to what happens with boats (sacrifice anode)?
>
>TIA,
>
>Carlos.
>
>
>
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