### Steel Plate Pickling Process Animation Script **(Total Duration: 2 Minutes)** --- #### **Scene 1: Introduction to Hot-Rolled Steel Plate** - **Visuals (5 seconds)**: Close-up of a hot-rolled steel plate with visible **iron oxide scale** (dark, rough surface). Zoom out to show plates stacked in a factory. - **Voiceover**: *"Hot-rolled steel plates develop a thick layer of iron oxide scale during manufacturing. This scale must be removed to ensure surface quality for further processing."* --- #### **Scene 2: Pre-Treatment Cleaning** - **Visuals (10 seconds)**: Steel plates move on rollers into a **alkaline cleaning bath**. Show bubbles removing oil/grease. Plates emerge dripping. - **Voiceover**: *"Plates undergo alkaline cleaning to eliminate oils and dirt. This pre-treatment prepares the surface for efficient acid pickling."* --- #### **Scene 3: Immersion in Pickling Tank** - **Visuals (30 seconds)**: - **Tank Detail**: Stainless steel tank filled with **hydrochloric acid (HCl) solution (15-20% concentration)**. Acid bubbles visibly. Thermometer shows **50-60°C**. - **Process**: Plates lowered into acid via overhead crane. Use cross-section animation to show: - Oxide scale (**Fe₂O₃/Fe₃O₄**) reacting with HCl: `Fe₃O₄ + 8HCl → FeCl₂ + 2FeCl₃ + 4H₂O`. - Hydrogen gas bubbles rising as scale dissolves. - **Voiceover**: *"Plates are immersed in heated hydrochloric acid. The acid reacts with iron oxides, dissolving scale into soluble chlorides while releasing hydrogen gas. Residence time: 10-20 minutes."* --- #### **Scene 4: Rinsing & Neutralization** - **Visuals (15 seconds)**: Plates exit the pickling tank, entering a **cascade rinse chamber**. Water jets spray both sides. Next, plates pass through a **alkaline neutralizing bath (sodium carbonate)**. - **Voiceover**: *"Residual acid is removed via high-pressure water rinsing. A neutralizing bath then eliminates traces of acid, preventing re-corrosion."* --- #### **Scene 5: Drying & Inspection** - **Visuals (10 seconds)**: Plates enter a **hot-air drying chamber**. Close-up on smooth, scale-free surface. Laser scanner checks for defects. - **Voiceover**: *"Drying ensures moisture removal. The cleaned surface is inspected for uniformity—critical for downstream processes like galvanizing or cold rolling."* --- #### **Scene 6: Chemical Management & Safety** - **Visuals (15 seconds)**: Show **regeneration unit** recycling spent acid into **ferric chloride**. Workers in PPE (face shields, gloves) monitoring controls. - **Voiceover**: *"Spent acid is regenerated to reduce waste. Safety protocols—including fume extractors and protective gear—are vital due to corrosive vapors."* --- #### **Scene 7: Final Product & Applications** - **Visuals (10 seconds)**: Gleaming steel plates stamped **"Pickled & Oiled (P&O)"**. Montage: plates transformed into automotive parts/appliances. - **Voiceover**: *"The output is P&O steel—clean, reactive, and ready for coating or forming. This process enables corrosion-resistant end products."* --- #### **Closing (5 seconds)** - **Visuals**: Factory overview with logo. Text: "Pickling: Precision Surface Preparation." - **Voiceover**: *"Innovating steel for a resilient future."* --- ### Technical Notes: 1. **Animation Style**: 3D industrial realism. Highlight acid bubbles, chemical reactions, and texture changes. 2. **Key Terms**: - Oxide scale: **Fe₂O₃/Fe₃O₄** - Acid: **Hydrochloric Acid (HCl)** - Neutralizer: **Sodium Carbonate (Na₂CO₃)** - Byproduct: **Ferric Chloride (FeCl₃)** 3. **Timing**: Strictly 120 seconds. Prioritize pickling tank (25% of runtime) and reaction mechanics. 4. **Safety Symbols**: Include hazard signs (corrosion, fumes) during acid immersion. By focusing on metallurgical accuracy and high-detail machinery, this script ensures clarity while adhering to the 2-minute limit.