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Re: TIG Welding Aluminum
[Re: Stanton]
#545589
12/05/09 12:09 AM
12/05/09 12:09 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
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what ever you do, DO NOT use brakleen anywhere within about ten miles of where you are going to weld that.
Thanks, but you're a week late with that advice. Anyhow, tell me why. I'm guessing I was fortunate that nothing happened as a result.
oh, nothing too serious, only that the fumes could KILL you.
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Re: TIG Welding Aluminum
[Re: Stanton]
#545590
12/05/09 12:14 AM
12/05/09 12:14 AM
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Joined: Jan 2003
Posts: 3,048
Richmond, Tx. (Houston)
GTSDave
master
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master
Joined: Jan 2003
Posts: 3,048
Richmond, Tx. (Houston)
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It's not so much about getting the oil out folks. Aluminum oxidizes and forms a thin layer of aluminum oxide. It melts at 2 to 3 times the temperature of aluminum.
Even if it looks shiny and brand new, it still has a layer on it. Cleaning it off is done with chemicals and the stainless wire brush. If you dont clean it off, once you have the heat high enough to melt it, the aluminum underneath will just run out like water.
Think of it like breaking the crust on a pie, once you get through the top layer everything underneath will be goo.
If you get that thin little layer off aluminum oxide off first, then you only need enough heat to form your puddle in the aluminum. And wont have the danger of melting away the good stuff.
If that makes any sense.
-Dave
PLEASE Pray for our brothers and sisters in harms way. If you are the owner of a GTS us at the GTS Registry www.gtsregistry.com
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Re: TIG Welding Aluminum
[Re: GTSDave]
#545591
12/05/09 12:34 AM
12/05/09 12:34 AM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
master
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master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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IMO Just use a stainless wire brush and some heat... No matter what type of chemicals you put on it, when you hit it with some heat those impurities will boil to the top...Just apply a little heat and wire brush it.  Also you can fill the intake runner with some air arch gouging rods and weld away...They will back up the puddle and the weld wont stick to it at all. Check this stuff out http://www.aluminumrepair.com/video_new.asp
Last edited by Bob_Coomer; 12/05/09 12:35 AM.
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: TIG Welding Aluminum
#545593
12/05/09 02:17 AM
12/05/09 02:17 AM
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Joined: Apr 2007
Posts: 871
WA 98043
thecarfarmer
super stock
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super stock
Joined: Apr 2007
Posts: 871
WA 98043
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Quote:
Quote:
Quote:
what ever you do, DO NOT use brakleen anywhere within about ten miles of where you are going to weld that.
Thanks, but you're a week late with that advice. Anyhow, tell me why. I'm guessing I was fortunate that nothing happened as a result.
oh, nothing too serious, only that the fumes could KILL you.
Depending on the formulation of brake cleaner you use, it can make phosgene gas when hit w/ a flame.
And it only takes the tiniest whiff of that to mess you up (seizure, nerve/brain damage, pancreas damage, erc) or kill you. Really, really bad stuff.
Maybe one of the few things that makes hydrazine look safe.
-Bill
Seduce the attractive, and charm the rest.
******
489 C.I.D., roller cam, aftermarket heads, tunnel ram, stock '54 Dodge rear axle assembly: which of these doesn't belong?
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Re: TIG Welding Aluminum
#545597
12/06/09 12:24 AM
12/06/09 12:24 AM
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Joined: Feb 2004
Posts: 6,257
acworth / N. georgia - south e...
cheapstreetdustr
master
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master
Joined: Feb 2004
Posts: 6,257
acworth / N. georgia - south e...
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Quote:
Quote:
Quote:
what ever you do, DO NOT use brakleen anywhere within about ten miles of where you are going to weld that.
Thanks, but you're a week late with that advice. Anyhow, tell me why. I'm guessing I was fortunate that nothing happened as a result.
oh, nothing too serious, only that the fumes could KILL you.
or worse..youll be a walking Zombie...with no lung capacity..
365" Iron J heads,,3480lbs best 1.39 60ft on SS springs.10.54,124 mph ...6.67 1/8th et.average 60fts 1.46 w/ small cam &.063 no2 pill tagged & insured
[image][/image]
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Re: TIG Welding Aluminum
[Re: MR_P_BODY]
#545598
12/06/09 01:05 AM
12/06/09 01:05 AM
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Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
Moparnut426
I Live Here
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I Live Here
Joined: Mar 2007
Posts: 12,013
Finally a HUSKER again
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Quote:
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A stainless steel wire brush is fine as long as it is clean...maybe some alcohol to remove oils. A little trick is to put a piece of copper behind the hole when welding. The filler won't stick to it.
 ... has to be a stainless brush.... dont
sand blast it
I agree dont blast it, it can imbed any impurities deeper in the aluminum. One thing that works great to clean it is John Deere 80% either, let it sit to completely dry out, Either will completely evaporate without leaving any residues. I have done this for many years on aluminum, cast iron, copper, and stainless. Use the brass behind it and it will fill up easier.
Kasey 
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