Bob, List:
Excellent job of derusting!!! After doing what Bob says,
If anybody wants to.....see my site and note that the Corrosion Block will
keep rust away for up to a year and a half. List members get it for my cost
plus 10%. Stuff seems to work....and.....If you don't want it....then don't
get it. (-:
Skip
www.pro-blend.com
At 02:38 PM 5/4/02 +0000, you wrote:
>List,
> Years ago I was at a Redi-Strip franchise and watched a car body
>going in a tank. When it finally settled in I saw a spark where it made
>electrical contact. I asked "What are you doing, plating the rust off?"
>The propriator mumbled some gibberish, which told me I was on to
>something pretty simple, and I found out later just how simple it was...
>I finally got around to making up a de-rusting apparatus. It works
>great, and little by little the rusty artifacts around here are turning
>into good looking satin grey parts. It's especially rewarding to treat a
>hard to sand part like a steel wheel.
>Plating shops pickle (HCl) rust off (it's fast). This can introduce
>small Hydrogen molecules into the matrix of the steel, which over time
>travel and can introduce structural flaws and subsequent failure
>(Hydrogen embrittlement). Most, but not all, plating processes can do
>the same thing. An electric rust removal technique with subsequent
>painting or, say, electroless nickel plating, should not introduce free
>Hydrogen nor introduce a hazard in a tempered, stressed steel part.
>Also, you may be aware that a plated / got rusty/ got re-plated part
>doesn't last long without going rusty again. That's because free Oxygen
>gets introduced into the part when the initial rusting takes place, and
>that oxygen in the part will eventually react and produce rust again.
>This electric de-rusting process supposedly drives off the free oxygen
>as well...
>I'm also pretty sure the mild alkali solution with rust is good for
>making grass green here in acid-rich soil New England; somebody told me
>once that the Chem-Lawn guys put iron in their juice as it makes grass
>greener.
>http://www.metalwebnews.com/howto/rust/rust.html
>Remember, if it's hard, it's wrong! Bob Jepson in Boston
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