| Regular Spangle | Minimized (zero) Spangle | Extra-smooth | Galvannealed |
| The galvanized layer is cured in the normal way to produce spangles | Before the galvanized layer is solidified, spray with zinc powder or steam to control the crystallization of spangles or control the composition of the plating bath to obtain minimized spangles. | After galvanizing, it is tempered and rolled to create a smooth surface | After the zinc solution is taken out of the steel strip, it is treated in an alloying furnace to make the coating form a zinc-iron alloy layer. |
| Good adhesion, good weather resistance | The surface is slightly smooth, and the surface is even after painting. | The surface is slightly smooth, and the surface is even after painting. | The surface is smooth, and the surface is uniform and beautiful after painting. |
| Most suitable: guardrails, blowers, ducts, ducts. | Most suitable: drain pipes, ceiling brackets, wire conduits, center pillars on the side of rolling doors, color-coated substrates. | Most suitable: drain pipes, automotive components, electrical equipment, freezers, color-coated substrates. | Most suitable: Rolling doors, signs, car bodies, vending machines, refrigerators, washing machines, display cabinets. |
| Application: iron roll door, drain pipe, ceiling bracket. | Application: car body, guardrail, air blower. | Application: car body, guardrail, air blower. | Application: electrical equipment shells, office desks and cabinets. |
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