Finishing Services

Black Oxide

At a glance

Applicable Materials

Colors

Black

Texture

Smooth, matte black

Can be applied with

Media blasting, tumbling, passivation

About the Process

Black oxide is a conversion coating (similar to Alodine) that is used for steel and stainless steel. It is used mainly for appearance and for mild corrosion resistance. Black oxide impregnated with oil can provide the highest amount of corrosion resistance. Black oxide is formed in a process similar to anodizing, where the parts are dipped into various hot baths of chemicals that convert the surface of the material into magnetite, which creates the black color. Black oxide does not have a significant dimensional impact, therefore masking parts is not necessary. This process can take a longer time due to the manual labor required and the time it takes for the baths to come to the correct temperature.

YOU MIGHT ALSO BE INTERESTED IN

Tolerance Stack Ups 501: Going Beyond Mechanical Fit and Into Predictive Design

Tolerance Stack-Ups are a vital component of any engineer’s workflow, to ensure successful mechanical design fit. But successful engineers in demanding industries such as medical, aerospace, and automotive, need to rely on data to do more than this. They need data to improve real design outcomes beyond “guess and check” — to improve design understanding […]

Learn More

3-Axis to 12-Axis: CNC Milling Machine Capabilities Compared

Computer Numerical Control (or CNC) machining combines the efficiency of computer programming with the accuracy of lathe machines. The programmed software controls the movement of the tools and other machinery, thereby automating the manufacturing process and maintaining design consistency. Modern-day multi-axis CNC Milling Machines come with a wide range of features, which adds value and […]

Learn More