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RE: increasing exhaust/muffler life-span: durable finish?


At 06:37 AM 3/12/97, you wrote:
>Hanno,
>I can think of two issues....
>
> 1) The problem with some of these methods is that they only coat the
>    outside of the exhaust system.  Rust also starts from the inside
>    of these components, making these coatings inaffective.
> 2) Aluminum coatings will result in galvanic corrosion, especially in
>    areas where there is salt present.
>Michael


I think problem 1) is overcome by having the exhaust galvanised (=dipping in
hot zinc). Most of the shops I called were not willing to try this with an
exhaust, as they were afraid that it might float, warp, or even explode.
Yesterday I finally had one shop on the phone who said that they were
willing to try, but I have to go over there and show them the exhaust first.
The main problem with this dipping process seems to be that the shape has to
be such that the hot zinc can easily run in/out of the object and that is
has to have holes to suspend it on wires. Well, I guess the VW exhaust has
enough footholds where one can hook a wire, and when suspending it in a
certain way all fluids should drain. I'll see if I can make this happen.

Hanno Spoelstra <H.L.Spoelstra@WbMt.TUDelft.NL>
Bloemendaal, The Netherlands



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