Hot Blackening Salt VC FERROUS - Hot blackening salts for ferrous metals are used in a process known as hot blackening or black oxide coating. This technique involves immersing steel parts in a series of tanks containing heated alkaline solutions, usually at around 285°F to 310°F (140°C to 155°C), to produce a durable, corrosion-resistant black finish. The "VC" in your query might refer to a specific product or grade, but here is a general overview of hot blackening salts and their use for ferrous metals: * Safety Note: - This is a high-temperature and highly caustic process involving toxic fumes—proper PPE, fume extraction, and material handling protocols are crucial. - Would you like a datasheet-style summary, supplier options, or help with making your own blackening salt mix? # Hot Blackening Salt VC FERROUS Manufacturer.