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Black Nickel Plating

Electroplating & electroless plating · Electrolytic bath

Black nickel is a thin dark decorative electrodeposit, commonly applied over nickel, copper, brass, or zinc.

CNC machiningSheet metalPremium cost $$$Conductive
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Reference page — Black nickel is not in the instant-quote configurator. Upload the part, name the finish in the notes, and an engineer quotes it with the part.

Black Nickel Plating on a machined part

What is Black nickel?

It is chosen for appearance and optical absorption, not as a standalone wear coating.

How it works

A conductive, polished, and activated substrate is cathodically plated from a nickel-alloy bath that co-deposits darkening elements. A bright nickel or copper-nickel undercoat normally supplies leveling and corrosion resistance. The black top layer is thin and current-density sensitive, so edges can differ in shade and recesses can remain lighter. A clear lacquer or wax is often added to improve handling durability.

Why specify it

  • Dark charcoal to black metallic appearance
  • Thin 0.5–2 µm decorative top layer
  • Reduces reflections in optical hardware
  • Can preserve metallic visual texture

Where it falls short

  • Thin deposit scratches and fingerprints easily
  • Color varies with current density
  • Usually needs lacquer for handling
  • Not equivalent to black zinc or black chrome

Black nickel at a glance

Black nickel is strongest on cosmetic quality (86 of 100), at a premium cost. Surface hardness is not rated: the finish leaves the part's own surface.

Corrosion protectionFair45 / 100
Surface hardnessNot rated—
Cosmetic qualityExcellent86 / 100
LubricityLow25 / 100
Relative costPremium55 / 100
CorrosionHardnessCosmeticLubricityEconomy

Each score is 0–100 against every finish in this catalog. Corrosion comes from salt-spray life (ASTM B117, log scale) and hardness from the finish layer's Vickers or pencil hardness; cosmetic, lubricity and cost are FabDigit's engineering assessment. Economy on the radar is the inverse of cost.

Black nickel key numbers

Typical values from the governing specifications and shop practice; bars are this finish against the highest value among electroplating & electroless plating finishes.

Thickness0.5–2 µm0.02–0.08 mil
Thickness
0.5–1.5 µm black topcoat over a thicker copper or nickel undercoat
Electrical
Conductive
Colours
  • black
  • charcoal
  • smoke gray
Appearance
Semi-bright charcoal to deep black metallic; shade varies with geometry and topcoat.

Specifications for Black nickel

The documents a drawing cites to define this finish, with the Type / Class rows that apply. Each links to a page explaining the standard.

Drawing call-out

BLACK NICKEL PLATE, 1 µm NOMINAL, OVER 10 µm MIN BRIGHT NICKEL; DEEP BLACK SATIN APPEARANCE; CLEAR LACQUER TOPCOAT; APPROVED SAMPLE REQUIRED

Which materials take Black nickel?

Verdict per material family, with the grades that behave differently. Each family links to its datasheets in the material library.

Material familyVerdictNotes
Brass
YesCommon with nickel underplate.
Copper Alloy
YesCommon decorative substrate after preparation.
Aluminum
With careRequires zincate and underplating.
DMLS / SLM
With careMetal AM parts can be plated after density, powder, and porosity review.
Stainless Steel
With careNeeds activation and a nickel or other strike over the passive film.
Steel
With careUse copper/nickel underlayers.
Zinc Alloy
With careDie castings need a protective strike before acid baths.
Magnesium Alloy
LimitedHighly reactive; needs a qualified pretreatment and is rarely plated this way.
Polymer
LimitedOnly plateable resins after etch, catalyst, and electroless metallization.
SLA
LimitedOnly if the resin is qualified for metallization; most SLA parts are not.
Titanium
LimitedPossible only with specialized activation; not a routine job-shop sequence.
FDM
NoFused-filament polymers are not a standard plating substrate.
MJF
NoPorous nylon powder-bed parts are not a standard plating substrate.
SLS
NoPorous nylon powder-bed parts are not a standard plating substrate.

How Black nickel is applied, and what it does to the part

  1. 1Polish
  2. 2Clean
  3. 3Copper or nickel underplate
  4. 4Activate
  5. 5Black nickel plate
  6. 6Rinse
  7. 7Clearcoat or wax
  8. 8Inspect color
DimensionsAccount for the copper or nickel underplate; the black layer itself is normally only 0.5–2 µm.
Build-up per side5–25 µm — Total buildup is dominated by the underplate and optional clearcoat.
MaskingUsually needed. Mask fits, threads, electrical contacts affected by topcoat, and hidden rack locations.
ElectricalConductive
AppearanceSemi-bright charcoal to deep black metallic; shade varies with geometry and topcoat.
Added lead time5–10 working days on top of the bare part

Design rules for Black nickel

What to decide on the drawing before the part goes to the finisher.

  1. Approve a physical color sample.Black shade changes with bath, current density, and clearcoat.
  2. Specify underplate separately.It provides most leveling and corrosion resistance.
  3. Place rack marks on hidden surfaces.The thin black layer reveals contact witnesses.
  4. Define clearcoat compatibility.Lacquer changes gloss, conductivity, and temperature capability.

Black nickel versus the alternatives

Finishes engineers weigh against Black nickel, and when each wins.

FinishCorrosionHardnessCosmeticCostThicknessChoose it when
Black nickel
this page
45—86$$$0.5–2 µm—
Zinc-Nickel Plating
Black nickel vs Zinc-Nickel Plating →
866048$$5–15 µmwhen sacrificial corrosion protection on steel governs
Decorative Nickel-Chrome Plating
Black nickel vs Decorative Nickel-Chrome Plating →
647195$$$0.3–1 µmwhen bright blue-white appearance is desired
CorrosionHardnessCosmeticLubricityEconomy
Black nickelZinc-Nickel Plating

The radar overlays Black nickel with Zinc-Nickel Plating, its most common alternative — chosen when sacrificial corrosion protection on steel governs. Scores in the table are 0–100 across every finish in the catalog.

Cost, lead time and compliance

Relative cost

Black Nickel Plating is a premium-cost finish ($$$): more expensive than about 63 % of the finishes FabDigit quotes.

Finishing is priced per part with a lot minimum, from FabDigit's own China-side rates. The exact figure appears on the instant quote once the part is uploaded.

Lead time and compliance

Added lead time5–10 working days
RoHSCompliant
NotesCompliance depends on alloying constituents and clearcoat; obtain supplier declaration for the selected process.

What Black nickel is used for

  • Optical hardware
  • Camera components
  • Decorative controls
  • Architectural trim

Black nickel — frequently asked

what is black nickel plating

It is a thin dark nickel-alloy decorative topcoat, commonly 0.5–2 µm over brighter nickel or copper. The underplate provides most corrosion protection and leveling.

black nickel vs black zinc

Black nickel is decorative and usually relies on an underplate plus lacquer. Black zinc is a black passivate over sacrificial zinc, typically with 5–25 µm zinc on steel.

is black nickel plating durable

The 0.5–2 µm black layer is relatively delicate and often clear-coated. It is not a substitute for hard chrome, PVD, or other high-wear finishes.

can black nickel plate aluminum

Yes, after zincate and copper/nickel underplating. Total buildup is commonly at least several micrometres even though the black topcoat is only 0.5–2 µm.

is black nickel conductive

The metallic deposit is conductive, but lacquer or wax topcoats can insulate the surface. Keep electrical contact zones uncoated or qualify contact resistance.