 Why are these welds tarnished?, Brad? |
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| jonwatts |
 Apr 9 2003, 01:37 PM
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#1
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no rules, just wrong  Group: Benefactors Posts: 2,321 Joined: 13-January 03 From: San Jose, CA Member No.: 141   |
Cheap SS muffler on Ebay. Why are the welds tarnished?
(IMG:http://images.channeladvisor.com/Sell/SSProfiles/20056052/Images/mu-fireball-g2.jpg) |
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| seanery |
Apr 9 2003, 01:50 PM
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waiting to rebuild whitey! Group: Retired Admin Posts: 15,857 Joined: 7-January 03 From: Indy Member No.: 100 Region Association: None |
Jon,
In my expert opinion...(I've been welding now for 3 or 4 weeks)...maybe they were welding with copper. I'm not TIG welding yet, but I've heard that copper is awesome with Stainless Steel. The only problem they tell me about is that once the car is run for a while the copper heats up and may melt. If that starts to happen, just turn the car off and carefully reform weld with your finger. After doing this 3 or 4 times it won't hurt anymore and you can do just about anything with that finger without pain. I don't get why. Am I a moron or what. I'm missing welding class this week. I hope I don't miss too much! (IMG:style_emoticons/default/blink.gif) |
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| mskala |
Apr 9 2003, 03:10 PM
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#3
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R Group: Members Posts: 1,935 Joined: 2-January 03 From: Massachusetts Member No.: 79 Region Association: None 
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I'm not a metal expert, but it is *possible* that this
is just an artifact of the photo. When I take pics of extremely shiny things, they don't necessarily look right for a number of reasons like lighting and what else is reflecting off around there. Mark S. '70 914-6 |
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| jonwatts |
Apr 9 2003, 03:23 PM
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#4
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no rules, just wrong Group: Benefactors Posts: 2,321 Joined: 13-January 03 From: San Jose, CA Member No.: 141 |
Could be copper, I should have said why do they "look" tarnished.
I wonder how long those mufflers maintain their prettiness? |
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| Brad Roberts |
Apr 9 2003, 03:36 PM
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#5
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914 Freak! Group: Members Posts: 19,148 Joined: 23-December 02 Member No.: 8 Region Association: None |
They used a welding rod with high copper content.
They will be tarnished in about 3 weeks with road grime and the such. Close to impossible to keep clean unless you dont drive the car. B |
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| Tony C |
Apr 13 2003, 08:15 PM
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#6
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Master of Fire and Metal Group: Members Posts: 273 Joined: 27-December 02 From: Bay Area, CA, USA, Earth Member No.: 25 |
Just got back from OTC...
Jon the welds are a different color because the material was already polished before welding, then the part was welded and NOT polished again. The weld in the photo is a computer/robot/machine fusion weld. -Tony |
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| jonwatts |
Apr 13 2003, 11:26 PM
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#7
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no rules, just wrong Group: Benefactors Posts: 2,321 Joined: 13-January 03 From: San Jose, CA Member No.: 141 |
Cool. So when you do my cage it will be a bio/nacho powered/ tony weld
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| Tony C |
Apr 14 2003, 08:24 AM
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#8
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Master of Fire and Metal Group: Members Posts: 273 Joined: 27-December 02 From: Bay Area, CA, USA, Earth Member No.: 25 |
After last week and the amount of sleep I got, all my work is going to be Redbull powered for a while. (IMG:style_emoticons/default/biggrin.gif)
-Tony |
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