When two different metals are in contact and coupled with water and oxygen, sacrifice or current protection occurs. Zinc preferentially corrodes iron in steel. This protection prevents corrosion of the steel in areas not covered by zinc. Therefore, the diffusion of corrosion from cutting edges, drilling holes, etc. is minimized.
| Cold rolled slitting | Plate thickness | Plate width | Number of slitting strips | minimum | Precision for strip width |
| 0.15-0.4 | 200-1800 | 50 | 10 | ±0.03 | 20 |
| 0.4-1.0 | 200-1800 | 45 | 15 | ±0.03 | 25 |
| 1.0-1.5 | 200-1800 | 40 | 20 | ±0.03 | 25 |
| 1.5-2.5 | 200-1800 | 30 | 30 | ±0.1 | 35 |
| 2.5-6.0 | 600-1800 | 25 | 30 | ±0.1 | 35 |
SC2 preferentially corrode cold coil Chemical composition
GRADE | C% max | Mn% max | P% max | S% max | Alt% min | Ti max |
SC2 | 0.06 | 0.35 | 0.025 | 0.025 | 0.015 | 0.20 |
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