EPi is the only supplier to offer all three types of metal blackeners, which are differentiated by the temperature at which the solution will properly blacken a part.
Black Oxide is a blend of caustic oxidizers and additives that are used to blacken ferrous metals. The black-oxide coating is produced by a chemical reaction.
The result is the formation of black oxide on the surface of the metal being coated. In-house metal blackening offers a variety of advantages, including:
- Dimensional stability
- Anti-galling properties
- Smut-free, deep black finishes
- Aesthetic appeal
Hot-temperature black oxide (285 F°) is a conventional hot process which produces a true black oxide iron magnetite (Fe3O4) finish. It is a premium-grade salt mixture which will blacken a wider range of steel alloys than any other process on the market.
Select a hot black-oxide process to:
- Blacken parts in 10–20 minutes
- Produce a glossy blue-black color
- Create impressive abrasion and corrosion resistance
- Finish hard-to-blacken metals 5–10 minutes faster
- Produce no dimensional change
- Generate less sludge
- Blacken without baking, excessive handling, or producing volatile fumes
- Save money thanks to a low product-to-water ratio
- Work with cadmium, cast iron, stainless steel, steel, and zinc
Mid-temperature black oxide (225–255 F°) is the latest development in blackening processes, producing a true black oxide iron magnetite (Fe3O4) finish. It produces no caustic boiling fumes and provides a safer working environment.
Select a mid-temperature process to:
- Blacken metals in 30–45 minutes
- Produce glossy black appearances
- Achieve a uniform finish
- Create smut-free, abrasion-resistant finishes
- Blacken in a variety of methods
- Save energy in heating costs
- Pass oxalic acid military tests
- Create safer working environments
- Blacken steel, zinc, and copper-brass-bronze
Featured products: Kool-Blak 225
Room-temperature black oxide (65–85° F) is the preferred metal-blackening process for safe and convenient in-house blackening. It is an excellent non-bleed black finish for powdered metal and cast iron. It produces super deep blackness and corrosion resistance equal to hot oxide blackeners.
Select a room-temperature process to:
- Blacken parts in 1–5 minutes
- Produce grey-black satin finishes
- Resist corrosion
- Blacken cast iron, forged steel, tools, or powdered metals
- Save money in heating costs
- Produce no discharge and remain environmentally friendly
- Avoid generating hazardous waste
- Work with selenium compounds, rather than a true black oxide
- Blacken aluminum, cadmium, cast iron, stainless steel, steel, zinc, and nickel