Re: [DMCForum] stainless cleaner

[Josh Haldeman <jhaldeman@xxxxxxxx>]

I think I can provide an explanation...what was used to scratch it? (if 
you know)

I have a pin sized ding in my RH rear quarter panel that's been there 
forever...when I first noticed it, it was rusting.  I cleaned it out 
with some 80 grit sandpaper, and it never rusted again.  My theory was 
that something that could rust hit it, and was embedded on a microscopic 
level in the stainless.  When I used the sandpaper, it removed that.

-Josh



mike clemens wrote:

> Lauren,
>
> This is not meant to be a wiseass comment---I have a
> damaged Delo door that was "peed" upon, (not by me)
> and guess what, the dented parts are fine, but the
> scratched areas are rusting.  I realize this is not a
> scientific study, but, it verifies what I have always
> heard, SS rusts if scratched.
>
> If someone knows any other reason why it would rust,
> only in the scratches, I would be appreciative of an
> explanation.
>
> Mike
>
>
> --- Lauren <LPLand@xxxxxxxxxxxxx> wrote:
>
> >
> > Maybe I'm all wrong, it's certainly been a while
> > since I took
> > Chemistry, but the components of the alloy are
> > bonded in such a
> > way that a surface scratch (or even a deep one)
> > would still cut down
> > to a consistent  pattern of elements  no different
> > inside than on top. 
> > ..................LP
> > >
> > > I hope I remember this correctly, and anyone
> > please feel free to
> > > correct this as it has been awhile since my
> > material science classes.
> > >
> > > Stainless steel contains Chromium, and I believe
> > SS304 is at least 12%
> > > Cr. When the surface is scratched, the Cr reacts
> > with oxygen faster
> > > than the steel, creating the protective layer of
> > Chromium Oxide CrO3.
> > >
> > > Greg
> > >
> > >
> > >
> >
>
>
>
>            
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