Blackening Chemicals For Suppliers - Blackening chemicals are used for creating a black oxide or blackened finish on metals like steel, iron, or copper. These chemicals enhance corrosion resistance, minimize glare, and improve aesthetics. Here are some common blackening chemicals and their typical uses: 1. Alkaline Black Oxide (Hot Black Oxide) - Typically used on steel, stainless steel, and iron. - Involves immersing parts in an alkaline solution at around 135-150°C. -Creates a durable, matte black finish. 2. Cold Black Oxide (Room Temperature Blackening) - For mild steel, aluminum, and zinc. - Usually involves applying a liquid at room temperature for a less durable but visually similar finish to hot black oxide. #Blackening Chemicals manufacturer.