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Re: exhaust sytem work.

To: <dneuman@stars.sfsu.edu>
Subject: Re: exhaust sytem work.
From: "Fred Johnson" <Johnsof@jmspi.com>
Date: Tue, 21 Dec 1999 12:44:33 -0600
Dan;  where did you ever get the idea that stainless steel doesn't corrode?  
While it is certainly true that some alloys are extremely corrosion resistant, 
the lower grade alloys (304, for example) that frequently are the ones that are 
most "formable" (bendable) certainly do corrode.  As a matter of fact, a lot of 
late-model vehicles for the USA are equipped with parts of the exhaust system 
made of stainless steel, since the emissions systems are mandated to be 
warranteed for 5 years or whatever it is, and at least parts of the exhaust are 
considered to be part of the emissions control.  But the stainless pipes, heat 
sheilds, etc. don't last forever!

FYI, materials that contain chlorides (for example hydrochloric acid and sodium 
chloride - like in salt water) are pretty hard on stainless steel - at least 
the 300 grades that I'm familiar with.

Fred J.
69 SRL 009546
13 below zero and sunny today! (Wisconsin)

>>> Daniel Neuman <dneuman@stars.sfsu.edu> 12/21/99 12:00PM >>>
Hi MIke,
        Huh..rusting out from the inside huh?? I HOPE that was with thie 
older models. The guy at Summit said this was a newer model that is made
entirely of stainless steel.  So it better not rust out right???
                Daniel 69 2000
                SF CA
 
> Daniel,
> Periodically take the cap of the Supertrapp and check the inside for rust.
> Before putting it back together make sure to put anti seize on the cover
> bolts. I guess the Supertrapp is know for rusting out from the inside.
> 
> Mike



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