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Hi Simon, Tenifer and Melonite are trade names for firearm finishing processes that involve salt bath nitriding. It is a case hardening process that diffuses nitrogen and carbon into ferrous metals at sub-critical temperatures during a salt bath. Tenifer is not a finish. It's a process, in which the slide is placed in a chemical bath. The result is that the metal becomes extremely resistent to corrosion and rust. Stay safe & have a great day!

Tenifer is a ferritic nitrocarburizing process commonly used as a firearm coating. Let's delve into the details: Tenifer Coating: Process: Tenifer involves a salt bath nitriding technique that deeply penetrates the metal, enhancing its resistance to corrosion and wear. Color and Texture: The resulting finish is black and has a matte texture, making it visually appealing1. Benefits: Corrosion Resistance: Tenifer provides excellent protection against rust and other forms of corrosion. Durability: It significantly enhances the lifespan of firearm components. Attractive Finish: The matte black appearance adds to the aesthetics of the gun slide. Application: Tenifer is commonly used on firearm slides and other critical parts.

Hi Simom and welcome. Tennifer is the original finishing process used by Glock. There are several scientific write ups but in short, it's one of the hardest and toughess metal finishes available. Cheers and stay safe!