Metals International's continuous hot-dip galvanizing coils or sheets has been constructed with world advanced technology.Typical steel grade produced are SGCC and SGCD. At present, we can provide it in accordance with the international standards such as JIS, DIN and ISO (SZ stands for Zn-Al alloy steel, containing 5% Al in coated layer, equal to GF grade) and DIN EN standards to make products in type of CQ-SEDDQ, HSS-CQ-DDQ, BH, DP. Surface treatment includes passivation, finger print resistance and oiling.
Process flow of the line: 1.Full hard cold rolled coil - cleaning - annealing in a continuous horizontal furnace - dip galvanizing in the molten zinc pot (GI or SZ) - air knife - skin pass - stretcher leveling - chromic acid passivation/black resistance - oiling - coiling.
or 2.Full hard cold rolled coil - cleaning with electrolytic process - annealing in a vertical furnace - zinc pot (GI or GA pot) - alloying furnace - cooling tower - intermediate looper - skin pass - stretcher leveling - chromic acid passivation/finger print resistance - oiling - coiling