Blackening Chemicals For Automotive Industry - Blackening chemicals, commonly used for creating a protective and decorative black oxide finish on metal components, play a significant role in the automotive industry. These chemicals enhance corrosion resistance, improve aesthetic appeal, and reduce glare. Below are common types and recommendations for automotive applications: * Hot Blackening Chemicals - Best For: High-volume production of automotive components. - Process: Involves immersion in a series of alkaline and oxidizing salt baths heated to ~140-150°C. * Advantages: 1. Provides a deep, durable finish. 2. Excellent corrosion resistance. * Common Chemicals: 1. Caustic soda (sodium hydroxide). 2. Nitrate and nitrite-based oxidizing salts. # Blackening Chemicals Manufacturer.