| { |
| "Bright scratch": "A photo of Bright scratch, which shows a bright, reflective scratch running along the steel surface caused by friction with foreign objects.", |
| "Crazing": "A photo of Crazing, which shows a fine network of surface cracks due to uneven cooling or residual stress.", |
| "Crease": "A photo of Crease, which shows transverse fold marks caused by localized yielding during uncoiling.", |
| "Crescent gap": "A photo of Crescent gap, which shows a crescent-shaped indentation caused by cutting during the strip production process.", |
| "Dark scratches": "A photo of Dark scratches, which shows a dark linear or grooved scratch on the steel surface caused by mechanical abrasion or roller damage.", |
| "Finishing roll printing": "A photo of Finishing roll printing, which shows repeating dents caused by slippage between work rolls and strip during finishing.", |
| "Inclusion": "A photo of Inclusion, which shows irregular black or grey inclusions embedded during rolling due to smelting residue.", |
| "Iron scale compression": "A photo of Iron scale compression, which shows a region where dark gray iron scale compression is embedded into the steel surface, appearing as rough, irregular shapes.", |
| "Iron sheet ash": "A photo of Iron sheet ash, which shows embedded black particles or stains caused by accumulated metallic dust and oil.", |
| "Oil spot": "A photo of Oil spot, which shows oil stains with clear boundaries formed on the strip surface due to lubricant contamination, usually circular or irregular in shape.", |
| "Oxide scale of plate system": "A photo of Oxide scale of plate system, which shows dark linear or bruised marks fixed in position, caused by embedded oxide particles due to roller damage during high-speed hot rolling.", |
| "Oxide scale of temperature system": "A photo of Oxide scale of temperature system, which shows loose or scattered scale marks due to excessive temperature or uneven cooling.", |
| "Patches": "A photo of Patches, which shows localized areas with different texture or color caused by uneven processing.", |
| "Pitted surface": "A photo of Pitted surface, which shows deep, small pits on the steel surface caused by localized corrosion.", |
| "Punching": "A photo of Punching, which shows circular holes caused by unintended punching due to equipment malfunction.", |
| "Red iron sheet": "A photo of Red iron sheet, which shows reddish oxide patches caused by high-silicon steel oxidation during heating.", |
| "Rolled in scale": "A photo of Rolled in scale, which shows dark particles or streaks embedded in the metal surface, indicating that scale material has rolled into the base metal.", |
| "Rolled pit": "A photo of Rolled pit, which shows periodic dents or pits caused by damaged work rolls or tension roller defects.", |
| "Secondary rust skin": "A photo of Secondary rust skin, which shows a steel surface with flaky corrosion and uneven oxidized layers due to prolonged exposure.", |
| "Silk spot": "A photo of Silk spot, which shows wavy or banded patterns due to uneven roll pressure or temperature.", |
| "Slag inclusion": "A photo of Slag inclusion, which shows dark non-metallic inclusions with sharp contrast, caused by exposed slag during hot rolling.", |
| "Waist folding": "A photo of Waist folding, which shows wrinkle-like surface folds with rough texture, caused by severe local deformation due to low carbon content.", |
| "Water spot": "A photo of Water spot, which shows low contrast, irregularly shaped water spots caused by uneven drying.", |
| "Welding line": "A photo of Welding line, which shows continuous linear marks from coil welding during strip transition.", |
| "White rust": "A photo of White rust, which shows loose white-gray patches caused by zinc corrosion under humid conditions." |
| } |
