[Vwdiesel] Rabbit droppings # 160 --- ( Hagar on the SENILE virus ).

[James Hansen]

And by the way  I am going to try and smoke our man of STEEL out of his
Canola patch
and explain ---HYDROGEN    imbrittlement of steel      ---jep James Hansen.

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I wish he was out in the canola patch.  Had to tear down the fuel injection
system in the 450hp Cummins in the tractor, so unless I hitch a looooong
string of horses together, for now, not a whole lot of planting going on.
Should see some activity tomorrow afternoon.  So why does stuff always seem
to blow up on the friday night of the long weekend?  That's what I want to
know.
Hydrogen embrittlement.  Gee, Hagar, you're making me think, it's late.

It's thought to cause stuff like bolt failures when using the shiny plated
bolts, and on chromed parts- the electroplating action causes hydrogen to be
absorbed by the metal, where it reacts with carbon in the metal grain
structure.  Methane gas is formed, so to fart, the metal has to break along
the grain boundaries.  Not great if it's a part you like, say on a wing, or
a wheel for instance.  Also corrosion can produce hydrogen with similar
effects, and welding. You have probably heard the term "low hydrogen filler
rod"  the welding filler rods are heated to drive any free hydrogen out so
as to not expose the weld surface to an embrittling agent.
I like teasing the shiny chrome engined weekend drag racer guys about
hydrogen embrittlement and electroplating.
-James

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