[s-cars] another list lurker finally buys an urS4! andaQuestion...
robert at s-cars.org
Wed May 12 09:41:39 EDT 2004
At 09:25 AM 5/12/2004, Kirby Smith wrote:
>More specifically, the zinc is intended to sacrifice itself instead of
>the steel. This helps keep the rust line from moving quickly, and, due
>to galvanic action, keeps the rust thickness in the already sacrificed
>area thin. Audi's galvanizing job might nonetheless be suspect at
>various times and places. I think every Audi I've owned shows rust on
>the surface to which the rear license plate lamps are mounted.
>Our own beloved WV Audifan and ex chemistry teacher should be able to
>provide an exact description, if he can rest his left wing for a bit.
OK, Kirby, I'll see if I can type with only one hand - the left one, of
Basically, your _righteous_ ramblings above are _right_ on the money. I
could give you some history on the name, etc., but - in a nut shell - the
zinc is a more active metal than iron and it is oxidized rather than the
steel it is bonded to. Given time, once a scratch in the paint is present
to expose the zinc and/or steel, oxidation will slowly "eat away" the zinc
and, eventually, leave the steel fully exposed. At that time it's
Katie-bar-the-door and severe rusting will get started big time.
Here is a link to a brief discussion of Galvanic cells which, if you're
interested, might prove helpful. http://en.wikipedia.org/wiki/Galvanic_cell
Rush Limbaugh on drugs.
Bill Bennett with a gambling problem.
Strom Thurmond with a mixed race daughter.
Somehow it all seems to fit. :-)
Robert L. Myers 304-574-2372
Rt. 4, Box 57, Fayetteville, WV 25840 USA WV tag Q SHIP
'95 urS6 Cashmere Grey - der Wunderwagen ICQ 22170244
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