Motor Scooter Exhaust

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Easter at the step parents, and my little brother was bummed out over his broken motor scooter.  Decided that I'd give it a shot and try to help since he's using it for transportation and slaves as a grade-school teacher.  I dont know what the heck this material is, but it was .025" thin according to my caliper.  Had to turn it all the way down to 10A on pulse using 1/16-70 TIG wire to keep it from BLASTING through (and it still wanted to ).  Built it up and ran a stitch all around to get it good and pretty.  It reacted really odd, making my arc wander alot (ground the tungsten three times before simply accepting it).  Used a respirator as it was letting off "nasties".  Proved positive with magnetic reaction too.  Any ideas what this stuff is?Brother went home happy (he's been walking to work for over a month now), and I got my first taste with really odd thin materials!ThermalArc 185MillerMatic 180 w/ AutosetVictor Cutskill Oxy/AcetyleneThermal Dynamics Cutmaster 38and spite!
Reply:It wasn't chromed was it?
Reply:The exhaust tube seemed like it was, but it came off easily with a wire brush.  It did have a coating though hence my using a respirator...Im NOT getting sick again.Last edited by DirtyLittleSecret; 04-09-2007 at 01:38 AM.ThermalArc 185MillerMatic 180 w/ AutosetVictor Cutskill Oxy/AcetyleneThermal Dynamics Cutmaster 38and spite!
Reply:great fix DirtyLittleSecret nice job and great easter pressie for your brother  Creative metal Creative metal Facebook
Reply:i wonder if it was a CAD/nickle plaiting ? prity commen on some of the out of the US parts. i suspose clear zink might be an option also it can give off a funny smoke also when welding it.good job on the fix i'll bet he is realy happy to be back on wheels insted of his dog's. summer is here, plant a tree for mother earth. if you dont have time or space, sponcer some one else to plant one for you.feel free to shoot me a PM or e-mail me at [email][email protected] i got lots of time.
Reply:Thanks.  Im pretty sure it was a nickel finish of some sort, but would this have led to the wandering arc issue? Ive heard of magnetized metal, but is there another reason for a metal to cause this?At least I did warn him that it was experimental at best prior to sealing it up!Forgot to add: seemed to help the arc by setting the tungsten "in" more than I'm used to.  Is this because of the thin material?Last edited by DirtyLittleSecret; 04-09-2007 at 11:29 AM.ThermalArc 185MillerMatic 180 w/ AutosetVictor Cutskill Oxy/AcetyleneThermal Dynamics Cutmaster 38and spite!