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Welt defect on GI products

Q. We at times have the issue of welts on our GI products. It happens once in a while and in batches. I tried to find some literature but unfortunately I have not come across one. It looks like smaller coil breaks but there is nothing on the substrate. I have a couple of micros and pics to share. Any information will be greatly appreciated.

58778

Thank you,

Abhilash Dash
galvanizing metallurgist - Columbus
August 9, 2012

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