Blackening Chemicals For Aluminum - Blackening aluminum requires specific chemical treatments to create a durable, darkened surface. Here are the main types of blackening chemicals for aluminum: 1. Cold Blackening (Room Temperature) Uses selenium-based solutions. Forms a thin, black oxide layer on aluminum. Provides decorative finish but low wear resistance. Common products: Birchwood Casey Aluminum Black, Caswell Aluminum Blackener. Ideal for small parts, touch-ups, and aesthetic applications. 2 . Hot Blackening (Industrial) Involves high-temperature alkaline solutions (e.g., sodium hydroxide, nitrates). Produces a durable, black oxide coating similar to steel blackening. Common in military and aerospace industries for high-wear parts. # Blackening Chemicals Manufacturer.