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ted_yosem
Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
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  Thread 61342

Black stripe on cleaned and annealed cold rolled coils




Q. GETTING BLACK SURFACE IN COLD ROLLED STRIPS / PROCESS ELECTROLYTIC CLEANING THEN ANNEALING

61342-1

JAGDISH MISHRA
- SAMBALPUR ORISSA INDIA
October 6, 2021
publicly reply to JAGDISH MISHRA

A. Hi Jagdish. We don't have much info upon which to hazard a guess yet, but it looks to me like oil/grease was getting onto that one particular area on the strip, and burning on and blackening up during annealing.

Luck & Regards,

ted_yosem
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
October 2021
publicly reply to Ted Mooney



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