HOT BLACKENING SALT( VCFERROUS)
What is VCFERROUS Hot Blackening Salt?
1. Definition:
- VCFERROUS: A proprietary blend of chemicals specifically formulated for use in hot black oxide processes. It’s designed to produce a uniform, durable black finish on ferrous metals.
- Black Oxide Coating: This is a conversion coating that transforms the surface layer of metal into a magnetite (Fe3O4) layer, providing both aesthetic and functional benefits.
2. Composition:
- Alkaline Salts: VCFERROUS typically contains a mixture of sodium hydroxide (NaOH) and sodium nitrate (NaNO3), which are essential for the oxidation process.
- Nitrate/Nitrite Salts: Sodium nitrite (NaNO2) or other nitrates are often included to facilitate the formation of the black oxide layer at high temperatures.
3. Temperature Range:
- The hot blackening process with VCFERROUS operates at high temperatures, usually around 285-300°F (140-150°C). Maintaining this temperature is crucial for effective coating.
