After degreasing treatment of steel strip made from cold rolling machine line ,steel strip is sent to continuous hot zinc galvanized machine line for the following processing:
1. annealed in annealing furnace.
2. hot dipped and zinc galvanized in molten zinc .
3. passivation or polishing
4. elongation and leveling
All the processing above constitute necessary manufacturing steps of hot zinc galvanized steel plate.
Hot zinc galvanized steel plate increasingly applies to apparatus, automotive , machines in office ,furniture and architecture.
| Classification | Catalogue | Product | Characteristics | Usage |
|---|---|---|---|---|
| Properties of steel plate | Hot rolled steel plate | Hot rolled hot zinc galvanized steel plate | SiIngle piece | Industry, civil construction |
| Common cold rolled steel plate | Cold rolled hot zinc galvanized steel plate | Coil and shearing | Industry, civil construction | |
| IF steel plate | IF hot zinc galvanized steel plate | Drawing will bring better property. | Automotive industry | |
| Surface and appearance | Large spangle | Large spangle zinc galvanized steel plate | Large and beautiful spangle | Industry, civil construction |
| Small spangle | Small spangle zinc galvanized steel plate | Small and evenly distributed spangle | Automotive and light industry | |
| Zero spangle | Spangle zinc galvanized steel plate | Zero spangle | Automotive and light industry | |
| Ingredient of zinc layer | Little Pb,Al contained | Spangle hot zinc galvanized steel plate | With spangle | Industry and civil construction |
| No Pb | Zero spangle zinc galvanized steel plate | Zero spangle ,corrosion resistant | Apparatus, automotive industry | |
| Fe-Zn alloy | Zinc alloy coated steel plate | Not shining , easily coated and welded | Automotive and light industry | |
| Zn-5%Al | Glfan steel plate | Atmospheric corrosion resistant | Industry and civil construction | |
| Zn-55%Al | Galvalum steel plate | Atmospheric corrosion resistant and oxidization resistant when temperature below 400 ℃ | Civil construction ,food industry and light industry | |
| Surface structure | Double side zinc galvanized | Zinc galvanized steel plate | Double side zinc galvanized, different material of zinc layer leads to different catalogue | Civil construction and light industry |
| Zinc layer of different thickness | Double side zinc galvanized, and zinc layers are of different thickness | Automotive industry |