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Hot Dipped Galvanised Iron Sheets Passivation Spot

March 30, 2017No CommentsCAMELSTEEL

One common surface defect of the hot dipped galvanised iron sheets and the handing method is passivation spot ( passivation yellow edge) :
1. The passivation squeeze roller distortion or roller surface disrepair. It will cause passivation spot.
2. The two sides tuyere have a long distance with the hot dipped galvanised iron sheets edge. So the pressure of the squeeze roller will be smaller, and the strip steel will deviate the center. Then it will cause the passivation yellow edge.
3. After the stop or when the squeeze roller is not working properly, it forms the passivation drying in the surface of the passivation solution . And it will form the passivation drying bellows or form the passivation yellow marks.
4. The temperature of passivation fluid is too high, and the passivation film is too heavy. Therefore, the steel board becomes yellow.
5. The temperature of steel in passivation gutter is too higher.

About Us

Zibo Camel Material Co., Ltd. was created in 2009 and focus on creating famous steel coil brand – CAMELSTEEL. We are professional manufacturer and trading company of steel coils. Our main products include prepainted galvanized steel coil, prepainted galvalume steel coil, galvanized steel coil , galvalume steel sheet and corrugated roofing sheet etc. .And they are widely applied in the area of building, household appliances, light industry and decoration etc. , both domestic and foreign markets. We adopt advanced production technology in produce process. And there are two color coated steel line, two galvanized line and one galvalume line.

CAMELSTEEL consistently carry out the policy of “Customer first, employees of the second, third shareholders” and the tenet of “Treat people with sincerity, start business with trustiness”. We insist brand building of main line, market demand oriented, not afraid to innovate, keep providing the first-class service and quality products for customers indeed.

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