[TheForge] Brushed finish

Fri Feb 14 18:26:00 2003

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
>
>
>
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