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Framebuilders Thinking about a custom frame? Lugged vs Fillet Brazed. Different Frame materials? Newvex or Pacenti Lugs? why get a custom Road, Mountain, or Track Frame? Got a question about framebuilding? Lets discuss framebuilding at it's finest.

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Old 12-13-11, 10:42 AM   #1
w98seeng
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Rust Hole Repair Possible?

I bought an 80's Swinnerton with a full (except wheels) C-Record group on it. The frame is Columbus Max tubing and has some beautiful weld finishing. The fork and chainstays are chrome, but is a bit worse for wear, but I can clean it up nicely, or repaint with new decals, which I can make at home.

My only concern is a rust hole on the bottom of the non-drive side chainstay. It was covered with foil tape so I didn't see it when I bought the bike at an auction. As I have never heard of Swinnerton, got the bike for the C-Records components anyway.

Can this be brazed closed, or welded? I'l, file it smooth then repaint the area.

Thanks for the info,
Ian

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Old 12-13-11, 11:12 AM   #2
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It's toast, especially with the chrome. With that said, have it de-chromed, and the chainstay is one of the simpler tubes to replace. I wouldn't patch it, as the damage is done.
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Old 12-13-11, 04:32 PM   #3
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I know I'm conservative, but I don't think I would trust a frame that rusted through. Seems like the chainstay is the least likely tube to rust through
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Old 12-13-11, 06:55 PM   #4
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I have a De Rosa that came with a cracked non-drive side chainstay. I had Bernie Mikkelsen replace the tube. It turned out that the previous owner had some paper towel remains stuck in there (while cleaning?). Any water that found its way into the frame collected around the paper, eventually rusted it through.
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Old 12-13-11, 08:59 PM   #5
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Thanks for the info. Any idea what it would cost to replace?

Ian
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Old 12-14-11, 08:06 AM   #6
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You probably should pull the bb and try to see what else is rusted...might be a lot more than one chainstay.
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Old 12-14-11, 10:05 AM   #7
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My guess is that the rust isn't local to just that one spot. I'd probably give that frame a pass unless you can determine the amount of rust in the remainder of the frame, or the value warrants repair.
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Old 12-14-11, 12:37 PM   #8
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The fact that the stays are chrome plated really complicates any repairs. As mudboy says, all of the plating should be removed before heating it with a torch primarily because of the danger associated with inhaling hexavalent chromium, a potent carcinogen.

Quoting from the OSHA hexavalent chromium fact sheet,

Quote:
Originally Posted by OSHA
Workplace exposure to hexavalent chromium may cause the following health effects:

• lung cancer in workers who breathe airborne hexavalent chromium

• irritation or damage to the nose, throat, and lung (respiratory tract) if hexavalent chromium is breathed at high levels

• irritation or damage to the eyes and skin if hexavalent chromium contacts these organs in high concentrations.

Employees can inhale airborne hexavalent chromium as a dust, fume or mist while:

• producing chromate pigments and powders; chromic acid; chromium catalysts, dyes, and coatings

• working near chrome electoplating

welding and hotworking stainless steel, high chrome alloys and chrome-coated metal

• applying and removing chromate-containing paints and other surface coatings.
http://www.osha.gov/OshDoc/data_Gene...t_chromium.pdf

Nasty stuff.
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