VCFERROUS HT Hot Blackening Chemical - Hot blackening, also known as hot black oxide coating, is a chemical conversion process that imparts a durable black finish to ferrous metals like steel and iron. This method enhances corrosion resistance, reduces light reflection, and improves the aesthetic appeal of metal components.​ * Process Steps 1. Cleaning: Thoroughly remove oils, grease, and contaminants from the metal surface. 2. Rinsing: Rinse the parts to eliminate any residual cleaning agents. 3. Black Oxide Bath: Immerse the parts in the heated alkaline solution to develop the black oxide layer. 4. Rinsing: Rinse to remove any remaining chemicals. 5. Sealing: Apply oil, wax, or lacquer to seal the porous oxide layer, enhancing corrosion resistance. ​# VCFERROUS HT Hot Blackening Chemical Manufacturer.