Blackening chemicals for metal
Blackening chemicals for metal are used to apply a black oxide finish to ferrous metals, such as steel and iron, providing both aesthetic and protective benefits. This process, often referred to as black oxide coating or cold blackening, is essential in various industrial applications. Here’s an overview of blackening chemicals, including the types available, their uses, and key considerations.
*Types of Blackening Chemicals
_Hot Black Oxide:
1. Process: Involves immersing metal parts in a hot alkaline solution, typically at temperatures around 285°F (140°C).
2. Application: Common in industrial settings for components that require a durable, high-quality finish.
3. Examples: Birchwood Casey TRU TEMP, EPI Ultra-Blak 400.
_Cold Blackening:
1. Process: Applied at room temperature, usually involving immersion or brushing of the chemical solution onto the metal surface.
2. Application: Suitable for smaller scale operations and when heat treatment is not feasible.
3. Examples: Birchwood Casey Presto Black, Caswell Black Oxide.