Instant rusty colour around outside of weld?

[Noods]

Been doing some tig welding on 3 mm mild Steel butt welds mainly, all went great but one thing I'm noticing is, as soon as I've finished my bead run around the perimeter of the weld it goes a rusty golden brown colour, is this normal or am I doing something wrong! I'm running at 80amps everything was clean and bright cleaned with acetone pure argon gas set at 5 lpm..
Post gas for 5 seconds..

Sorry should have got a pic, came home and had stupidly forgotten to take some.. Stupid boy! X

 

[eSCHEn]

By rust do you mean a brownish soot deposit?

 

[Brad93]

Contamination. Either from electrode, the base metal, filler or from lack of gas coverage.

 

[Noods]

By rust do you mean a brownish soot deposit?

No it's part of the metal itself, like you get a blue colour when you heat metals sometimes, but this time a dark straw colour..

 

[Noods]

Contamination. Either from electrode, the base metal, filler or from lack of gas coverage.

Ok thanks.. Electrode is new and shines.. Todd are new too, steel I cleaned via flap sanding discs and then used acetone to wipe before welding... Is there anything else you would advise me to do.. ?
Many thanks

 

[eSCHEn]

More gas would be the answer if it had been sooty but if you mean a straw heat tint then that's normal depending on the energy you put into the metal.

Definitely picture time buddy

 

[Richard.]

By welding you shouldn't be adding any rust unless the steel is wet in the first place which you need a clip round the ear for welding wet metal lol. Sounds like heat tint noods if it cannot be wiped off and the weld looks good itself. Heat tint is a normal thing. As above a pic would determine for sure.

 

[Noods]

More gas would be the answer if it had been sooty but if you mean a straw heat tint then that's normal depending on the energy you put into the metal.

Definitely picture time buddy

Welding again tonight so will post pic for you's X

 

[Noods]

By welding you shouldn't be adding any rust unless the steel is wet in the first place which you need a clip round the ear for welding wet metal lol. Sounds like heat tint noods if it cannot be wiped off and the weld looks good itself. Heat tint is a normal thing. As above a pic would determine for sure.

No I haven't been a bad lad lately.. The steel can from fresh stock but because it's in 6mtr lengths it's been outside for a while till I've got around to cutting it and welding it.. It was nice n dry before welding trust me and clean.. Will weld later and show pics.... If my welding is up to being shown to the experts lol X any news on green grinding wheel yet?... I've found white ones?

 

[Richard.]

No I haven't been a bad lad lately.. The steel can from fresh stock but because it's in 6mtr lengths it's been outside for a while till I've got around to cutting it and welding it.. It was nice n dry before welding trust me and clean.. Will weld later and show pics.... If my welding is up to being shown to the experts lol X any news on green grinding wheel yet?... I've found white ones?

I'll take mine off and send you a pic. Can't remember where I got it from.

 

[Noods]

I'll take mine off and send you a pic. Can't remember where I got it from.

Hi Richard

I managed to get a Green wheel today.. A lot better as you said, easy to get to a nice point and Tig runs so much better for it too..

Thanks Mate for being there.. Appreciated..

Noods

 

[Richard.]

Sorry noods I didn't get back to you I haven't had chance to look at mine yet. Glad you got it sorted mate.

 

[Noods]

Sorry noods I didn't get back to you I haven't had chance to look at mine yet. Glad you got it sorted mate.

No worries mTe thank you for all your time and help... So Muchly appreciated ..

 

[Richard.]

When are you gonna get that little buddy160 round my way for a bit of tigging mr noods.

 

[Noods]

When are you gonna get that little buddy160 round my way for a bit of tigging mr noods.

Ha.... Yes I must mate.. When I'm next off on holiday I guess.. At mo averaging 72 hrs a week at work.. = 2x12hr days followed by 4 x12hr nights.. So at mo just getting very little time off.. But, I will do mTe.. X

 

[Richard.]

Ha.... Yes I must mate.. When I'm next off on holiday I guess.. At mo averaging 72 hrs a week at work.. = 2x12hr days followed by 4 x12hr nights.. So at mo just getting very little time off.. But, I will do mTe.. X

That's a lot of hours mate I hope they look after you for that.