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Method to Correct the Surface Defects of Galvalume Steel Coil
1. The surface is prone to friction black spots if there is a foreign body on the surface of galvalume steel coating steel coil or between the coil surface friction, easy to produce friction black spots, especially in the process of transportation. High quality galvalume steel coating steel coil, the best use of oil coating rust resistance, fingerprint coating or use vertical transport, can be avoided.
2. The surface zinc flower uneven this point is mainly due to the rapid cooling uneven or uneven content of aluminum, may also be the raw material roll surface roughness caused by uneven.
3. Galvalume steel coating steel coil surface pinhole or exposed steel defects this is mainly due to the low content of silicon in the plating solution, steel belt in the furnace nose zinc solution ash or is caused by oxidation in the furnace.
4. Take the horn of the edge of this situation is thick coating will cause the horn of the edge of the edge, and on the one hand is due to improper adjustment of the air knife, will also cause the thick edge of the situation, galvalume steel coating steel coil thick edge defect, take the edge of the horn of the edge can take wrong side to take the roll and other means of control.