Electro-galvanizing is a precise surface treatment technology that forms a pure zinc protective layer on the surface of steel through electrolytic deposition at room temperature.

Galvanizing is the most effective and economical process for protecting steel with a "rust-proof coat". Its core principle is based on the "sacrificial anode" protection theory: even if the coating is damaged, zinc will corrode first, thereby protecting the internal steel substrate from rusting.

Cold rolling is a critical downstream process closely linked to hot rolling. It is a precision finishing operation performed at room temperature on hot-rolled products (coils). Its primary purpose is to produce steel with thinner gauges, tighter dimensional tolerances, superior surface quality, and enhanced mechanical properties.

The essence of hot rolling is: Plastically deforming metal above its recrystallization temperature (typically 1100°C – 1250°C) through multiple passes. The high temperature enables dynamic recrystallization, which eliminates work hardening, resulting in the final shape and desired properties of the steel.

Its key advantages are: Low deformation resistance, low energy consumption, high production efficiency, and suitability for mass production.