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What is the technological process of galvanized sheet?

What is the technological process of galvanized sheet?

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The main process of galvanized sheet

Winding up → double unwinding → cutting head and tail → welding → alkali washing → primary scrubbing → electrolytic cleaning → secondary scrubbing → hot water rinsing → hot air drying → inlet looper → hot dip galvanizing (ceramic zinc pot) → continuous annealing → Air knife purging (introduced) → Air cooling after plating → water quenching → flat machine (reserved) → stretching straightener → passivation treatment (reserved for fingerprint resistance) → Outlet looper → oil coating → shearing → Coiling → unloading → weighing → packing

Function of each section of galvanized wire

Cleaning section: Remove cold rolling lubricating oil and iron powder from strip surface. Cleaning before the entry looper helps the strip track steadily within the entry looper while avoiding dents and scratches.

Inlet looper section: When welding stops at the inlet, vertical looper of effective length is provided to enable continuous production line.

Furnace section: vertical continuous annealing furnace, reaching the specified annealing period.

Galvanizing section: Soak strip steel in a molten zinc pot for galvanizing.

Flat machine and tension straightener section: improve performance.

Post-treatment stage (passivation) : Tandem two-roll coating machine with furnace and cooling device for coating chromate solution against white rust and fingerprint.

Outlet looper section: When the outlet section stops cutting, vertical looper of effective length is provided to enable continuous operation of the production line.



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Zhishang Steel has always been a pioneer in custom steel and special supplies, and has been recognized for its efforts in enhancing work efficiency and product quality. In addition to ISO9001:2015 certification, we also adhere to strict quality policies and proprietary procedures. If you have any questions, please contact us to provide the best type of product solution for your pre-painted, coil coating metal process, we will closely support after-sales service to ensure that your subsequent problems can be solved in a timely manner, if you have any questions, please send email to info@zhishangsteel.com, we look forward to serving you.

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Zhishang Steel Co., Ltd


Zhishang Steel, specializing in domestic steel products trade, warehousing, processing and other services. The team has four service teams: Shandong Zhishang Steel Co., LTD., Shandong Zhiyiheng Trading Co., LTD., Tai 'an Zhishang Economic and Trade Co., LTD., Shandong Zhishang Steel Structure Co., LTD. Mainly engaged in steel coil, coated, stee···

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