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Ted Mooney, P.E. RET
Pine Beach, NJ
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for Metal Finishing since 1989
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Pot annealed copper discoloration
I am working in wires and cable manufacturing firm. We have been encountering problems of discoloration with our annealed copper. The outside part of the spooled copper is bright and shiny but the inner portion is reddish to brownish in color.. What may be the reason for this? We have tried some experiments of adjusting temperature and annealing time but we have not come up with a perfect result. We hope somebody can share their experiences on this matter. Thanks in advance.
Edgar TabelinProduction Engineer - Philippines
September 3, 2009
October 22, 2009
Dear,
Discoloration is related to the oxygen content or moisture of annealing furnace atmosphere.
Please be sure about content of oxygen below 5 ppm and RH% below 2
- Iran
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