Liquid Nitriding (LN) is a subcritical surface enhancement process. It is a commonly used term for the diffusion process that is actually liquid nitrocarburizing. This is a thermo-chemical reaction where primarily nitrogen and other elements are diffused into the surface of iron-based materials through a salt bath. An iron-nitride compound layer is formed that provides several benefits such as

Black Oxide is the process of forming a black iron oxide on the surface of ferrous metals, and is most commonly referred to as black oxiding, blackening, oxidizing, gun blueing. This process is most well known for its enhancements in aesthetics, improved lubricity and increased corrosion resistance.