ID'ing mystery filler

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My tig welder came with a handful of various filler rods. Most have a label stamped on them but there are a few that don't.By the color they appear to be brass or bronze. No flux coating evident. Since they were bundled in with the rest of the TIG filler I figured they were silicon bronze brazing rods. When I tried to use them, I ended up with a white mess that looked like when I tried to weld galvanized metal that I hadn't removed all the galvanizing from. I was able to get it to stick but it was unpredictable and messy, no way I was able to make a clean bead with it.I'm certain the parent metal was plain steel. I can use er70s2 filler on it without issue.  I'm mediocre at best when it comes to tig, so my technique is suspect. I just want to know if something is wrong with my technique, or if I have a gas brass brazing rod that got thrown in with the TIG filler? Maybe it is silicon bronze, but something else I'm doing wrong is causing the white stuff to appear.
Reply:Try heating it with O/A.  Could just be ordinary brazing rod that's reacting  that way to the intense heat of the TIG.
Reply:just a thought ? could be( nibral) and is welded using dcfor the nibral  (brass looking ) props (but not brass) d@m stuff is high dollar .....my cost 21.00 a lb --9 rods in a lb 1/8 in rod
Reply:I don't know much about brass/bronze fillers but I'd have to say the "white stuff" is due to zinc content (same as galvinizing) present in the rod IIRC.MM200 w/Spoolmatic 1Syncrowave 180SDBobcat 225G Plus - LP/NGMUTT Suitcase WirefeederWC-1S/Spoolmatic 1HF-251D-1PakMaster 100XL '68 Red Face Code #6633 projectStar Jet 21-110Save Second Base!
Reply:Duane - agreed, it seems to be zinc, that's why I had mentioned the galvanizing. But as far as I know silicon bronze TIG rod has 0% zinc in it. I just wasn't sure if something else in the silicon bronze rod could produce the same white residue.There were no torches in the shop the welder came from so I'm a bit stumped. I tried it in both AC and DC modes on the 300dx with the same result. I don't have an O/A setup. I'll have to dig in the garage, I thought years ago someone gave me one of those mini mapp/oxygen Weller torches. I'll try searching for TIG brazing threads to see if I can find a how-to.
Reply:Same thing happened to me when i tried using regular brass w/tigBrass= copper+zinkA butterfly without wings, is just an ugly bug