Applications:
Used principally on ferrous and some non-ferrous alloys (e.g., steel, stainless, copper alloys) for tools, fasteners, decorative covers, machine parts. Often for reducing glare, providing mild corrosion protection and a uniform black finish.
Advantages:
Provides a matte black finish that is uniform and reduces light reflection.
Improves appearance/ aesthetics of steel parts, hides minor surface defects.
Combined with oil, wax or other top-coat it gives improved corrosion resistance over bare steel.
Appearance:
Deep matte black or very dark grey appearance; typically a thin oxide film rather than a coating build-up.
Applicable Materials:
Steel, stainless steel (certain grades), some copper alloys.
Important Notes:
The oxide layer is very thin and provides only mild corrosion resistance; if the component is exposed to harsh environments, consider additional coating or treatment.
Surface preparation is important: cleaning, degreasing, removal of scale must be done for uniform colour.
Because it’s an oxide film, if the part is machined after treatment the black finish may be removed locally. Posting a protective top-coat may be advisable.
