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Re: exhaust sytem work.

To: Johnsof@jmspi.com
Subject: Re: exhaust sytem work.
From: Daniel Neuman <dneuman@stars.sfsu.edu>
Date: Tue, 21 Dec 1999 11:19:44 -0800 (PST)
Hi Fred,
        I thought stainless was called stainless cause it didn't rust??  I 
don't know what grade the muffler is made of but I know it has a several year 
warrenty.  Guess I don't know as much as I thought..
Which stainless alloys would be good for this application??
                Daniel 69 2000
 
> 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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