It could be important to check in all the parts in contact with the galvanized wire , sinker roler or stone, pullys, guides , wipes etc. , it looks one possibility could be that wires are geting the blak pints after galvanizing.
The purity and quality of zinc could also have some influence
Eduardo Anaya Senior Consultant INDEPA S.C. Mexico City Tel(011-52)555-407-7451
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