Blue-white sparks/scale?

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Jun 5, 2008
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This is more of a blacksmithing question. I was working tonight on forging a pair of tongs (to make knives with, there, now we're on topic). I was using some mystery metal I found in the form of a sucker rod of some kind. Actually, it was a piece that was used to join two wood rods together. The wood was originally held in by copper rivets that were a bear to get out. I split off the two ears that went around the wood rod, and used each one for a side of tongs. As I heated the metal up for the first time, and there was a glowing white/blue scale on it that flew off at the first few hits. I'm not too experienced, and I have no idea what that was. It wasn't quite a white like burning magnesium, but more bluish. The steel is mild, judging by the spark pattern, and it was all rusty, so I don't think it was galvanized. Any ideas?
 
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Could it be sulfur? I think this might have been old oilfield equipt, and it kind of stinks like sulfur when I grind it. Anyone?
 
It could be a lot of things. Galvanized, sulfur, some sort of coating. The real thing is that you do not know what it is. It may have extremely toxic fumes. This is another reason to avoid mystery metal. People have died (not joking) from this type of situation.
Stacy
 
that sounds very much like what happens when burning off galvanization. i have on occasion burned it off intentionally, out doors staying up wind, but not for years and i wouldnt risk it again. get some known steel, its the only safe thing to do. there are all kinds of alloys that give off very harmful fumes when welded and im sure the same applies to forging.
-Lou
 
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