[TheForge] Brushed finish

Fri Feb 14 18:34:01 2003

This ties with something I read last week about the blackest black coating
we have yet devised. They boil a metal (some type of Fe.) in, I think it
mustve been nitric acid, its used so far for coating the inside of
telescopes etc where you dont want any reflections.

----- Original Message -----
From: "Chris Kilpatrick" <[email protected]>
To: <[email protected]>
Sent: 15 February, 2003 9:52 AM
Subject: Re: [TheForge] Brushed finish

> passivation layers are layers of black oxide which can be acheived by
dunking SS in a pot of boiling unsweetened kool-aid.  That is how we
passivated the primary loop on our reactors, then we ran a basic solution to
cut down on rust. Stainless means it stains LESS not that it does not stain.
> ---
> It is I who formed the blacksmith,
> who fans the flame into a fire and
> fashions a weapon fit for it's work.
>
> On Thu, 13 Feb 2003 14:07:33
>  Bruce Freeman wrote:
> >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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