Re: [DML] Custom Made Gas-Flap door

[tobyp@xxxxxxxxxxxx]

Ed - When you put aluminum and stainless steel (or mild steel for 
that matter) together in close proximity, and add moisture, you get a 
wonderful battery.  The aluminum starts to dissipate, leaving a white 
powdery corrosion product called aluminum oxide.  All European cars 
with aluminum skins attached to steel frames require a isolator ply 
between the two materials to prevent the body skins from 
disappearing.  In the aerospace industry, when we put aluminum and 
stainless steel together (which happens a lot) we apply two coats of 
a chromium-rich epoxy primer to each material, so we have four coats 
of paint for protection.  We also fay seal the pieces together with a 
high-performance sealant so that no moisture can get between the 
layers of dissimilar materials, and install all fasteners with 
sealant as well.  In short, without extensive protection, putting 
them together is a bad idea.


Toby Peterson  VIN 2248 "Winged1"
DeLorean Parts Northwest, LLC
www.delorean-parts.com 


--- In dmcnews@xxxxxxxxxxxxxxx, "Ed Garbade" <edgarbade@xxxx> wrote:

> Can anyone give me a definitive answer with respect to dissimilar 
metal galvanic corrosion between stainless and aluminum?
> 
> Is it a problem or not?





To address comments privately to the moderating team, please address:
moderators@xxxxxxxxxxx

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
     http://groups.yahoo.com/group/dmcnews/

<*> To unsubscribe from this group, send an email to:
     dmcnews-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
     http://docs.yahoo.com/info/terms/