Chemical Blacking (also known as black oxide coating) is a chemical conversion process that produces a durable black finish on ferrous metals such as mild steel, stainless steel and tool steel. It enhances appearance, provides mild corrosion resistance (when sealed) and improves lubricity without affecting dimensions.
Creates an attractive, uniform black finish.
When it is sealed with oil or wax, it then offers resistance to rust and oxidation.
Adds no measurable thickness — ideal for precision components.
Reduces friction on moving parts and improves wear performance.
Cost-effective compared to plating or painting.
Common in tooling, fasteners, automotive, defence, and decorative components.
MIL-DTL-13924F but not limited to.
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