[TheForge] Brushed finish

Thu Feb 13 19:51:00 2003

Bruce,
Thank you for the details. I knew what would happen, I just didn't know how
to explain it.
Darrell

http://www.machinemaster.com
----- Original Message -----
From: "Bruce Freeman" <[email protected]>
To: <[email protected]>
Sent: Thursday, February 13, 2003 11:07 AM
Subject: Re: [TheForge] Brushed finish

Because SS is not a uniform material.  All SS that doesn't rust is
passivated.  Literally, the iron is etched out of the surface, leaving
behind chromium and nickel.  These form clear oxides - no rust.  Cut through
this outer layer and expose the iron and bingo, rust.

Now wheter wire brushing WILL cut through this outer layer, I don't know.
(A mild steel wire brush deposits mild steel on SS, so that's a different
thing.)  However, an abrasive pad certainly will cut through the outer
layer, because the abrasives they put on those things are much harder than
SS.

Bruce
NJ

>>> [email protected] 02/13/03 01:24PM >>>
Dan Scheid wrote:
>
> really, I thought that the property of stainless was in the material. Not
in
> the finish  how fast will it rust ?
> Dan Scheid
>
> > Don't forget that roughing the surface of stainless can make it subject
to
> > rusting. If it will be exposed to the elements, it will either need to
be
> > coated or pasivated.
> > Darrell

How does a rough finish change the inherent property of SS? I know that
if you use a plain steel wire brush etc for the brushed look you can get
some particles of steel in the SS that will rust,, but if you use a SS
wire wheel you should not have this issue.

Ralph

"Good is the enemy of Excellent. Talent is not necessary for Excellence.
Persistence is necessary for Excellence. And Persistence is a Decision."
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