Have
a question?
Need a quote?
Click here.
Black Oxide
Manganese Phosphate
Electroless Nickel
General information on black oxide coatings.
Black Oxide is used as a temporary protective coating for various products, including screws and tooling. This process is performed primarily on steel, although it can also be performed on stainless steel, with varying degrees of success.
Details:
- Our hot dip process gives results that are superior to the room temperature processes used by some shops.
- Does not result in dimensional change, surface build-up or distortion.
- Available with oil or wax, depending on corrosion resistance requirements.
Corrosion Resistance properties of Black Oxide Coatings
Black Oxide coatings are very limited in their ability to provide corrosion
protection under even mildly corrosive environments. Black oxide is often
used to provide shelf life corrosion protection for parts in storage.
The corrosion resistance properties may be enhanced significantly by adding
a supplemental corrosion inhibiting treatment.
Optical and Thermal Properties of black oxide coated
parts
The black oxide process produces a rich black surface. The gloss of the
finish can range from flat to semi-gloss and is dependent mainly on the
mechanical surface finish. A highly polished surface will have a much
higher gloss than a surface prepared with abrasive blasting.
Dimensional change of parts coated with black oxide
Parts processed with black oxide coating will generally not require any
special dimensional consideration. Parts can be made to finished size
prior to coating. The black oxide process converts some of the surface
material into it oxide forming a ultra thin film much less the 0.0001"
(actual thickness varies by alloy and process parameters).
Ordering Information
To process your request for quote (RFQ) or your order properly we will
need the following information about your parts:
- Base material? What alloy is your part made of? Please be as specific as possible.
- Do you want the part abrasive blasted prior to black oxide coating to flatten the gloss?
- Are there any areas of the part that you do not want the coating on? Include a drawing or sketch. Please note that masking a part generally increases the price due to the labor involved.
- Do you want a supplemental corrosion resistant coating applied after processing?
- What, if any, specification do you need the process certified to? e.g. MIL-F-495, MIL-C-13924, a prime contractor specification, etc.
- Any special handling requirements you may have.