What about the strip scraping in the annealing furnace?
When the plate shape is not good, the strip tension is too low or the nozzle is too close to the strip, it may cause the contact between the nozzle and the strip,
Thus forming an air knife scratch. This kind of defect causes the product to be wasted because the coating is scratched. Proper control of strip tension in productionForce and adjust the nozzle distance, can avoid this kind of defect happen.
