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Finishing Metal Open discussion on finishing sheet metal products. Feel free to share knowledge of a metal finishing products and or your own proven formulas.


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Old 03-19-2016, 02:22 PM
Bradleyc1982 Bradleyc1982 is offline
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Default Iron contamination.??

Hi, anyone used pickle paste?? Any tips?? Got an electrolytic cleaner to clean my tig welds but some parts are left with black/brown staining after use, was gona try pickle paste because I think its iron contamination?? Anyone have any other remedies for this?? I have attached a photo of what I'm talking about!!!! Thanks

Posted this elsewhere on the site but don't think it's the right section?!?
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Old 12-16-2016, 12:35 AM
tinstructor tinstructor is offline
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Default s/s contamination ?

It looks to me to be lack of sufficient gas shield and/or excessive tungsten stickout.
It's tough to say from the photo.Is that 304/308 or type 316L stainless? And,did you use dissimilar fill rod ?
> Also, if it was welded over a second time,it will carbon precipitate and have carbon inclusions. Overheating will also cause this look.
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