
Black Oxide Coating 101: What You Need to Know
Black oxide coating is a surface treatment applied to metals, including steel and iron. It creates a dark, smooth layer through a controlled chemical reaction. This finish is not shiny and doesn’t reflect light. Unlike paint or powder coating, it doesn’t add thickness to the part. The black layer is skinny, just a few microns. So, it won’t change the size or shape of the part.














