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Decorative Nickel-Chrome Plating

Electroplating & electroless plating · Electrolytic bath

Decorative chrome is a multilayer system: copper when needed, one or more nickel layers, and a very thin chromium topcoat.

CNC machiningSheet metalCastingInjection moldingPremium cost $$$Conductive
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Decorative Nickel-Chrome Plating on a machined part

What is Decorative chrome?

ASTM B456 classifies service severity and layer combinations.

How it works

The substrate is polished and activated, then plated with leveling copper where needed and corrosion-protective nickel. A thin chromium electrodeposit supplies the blue-white color, tarnish resistance, and scratch resistance. The nickel provides most thickness and corrosion protection. Current crowding affects all layers, and deep recesses may remain thin unless auxiliary anodes and shields are used. Duplex nickel layers with different sulfur contents can create electrochemical protection before the microporous or microcracked chromium topcoat is applied.

Why specify it

  • Mirror-bright blue-white appearance
  • Chromium topcoat commonly 0.25–1.0 µm
  • Nickel underlayers provide corrosion protection
  • Suitable for metal and plateable ABS systems

Where it falls short

  • Surface defects remain visible after plating
  • Deep recesses have weak coverage
  • Multilayer process adds cost
  • Cr(VI) baths and nickel release face regulation

Decorative chrome at a glance

Decorative chrome is strongest on surface hardness (71 of 100) and cosmetic quality (95 of 100), at a premium cost.

Corrosion protectionGood64 / 100
Surface hardnessVery good71 / 100
Cosmetic qualityExcellent95 / 100
LubricityFair40 / 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.

Decorative chrome key numbers

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

Thickness0.3–1 µm0.01–0.04 mil
Hardness700–1,000 HV
Salt spray96–500 h
Thickness
0.25–1.0 µm chromium over a service-condition-dependent nickel or copper-nickel system
Hardness
700–1,000 HV — Chromium topcoat hardness; the thin layer does not behave like thick hard chrome.
Corrosion (salt spray)
96–500 h per ASTM B117 to red rust on steel, ASTM B456 SC2–SC4 nickel-chromium systems (typical) — Requirements depend on substrate and SC1–SC5 multilayer system; CASS (ASTM B368) is the usual acceptance test.
Electrical
Conductive
Colours
  • bright silver
  • satin silver
Appearance
Bright, blue-white mirror or satin metallic appearance.

Where Decorative chrome sits among all finishes

Surface hardness (Vickers, log scale) against corrosion protection (salt-spray hours, log scale) for every coating FabDigit offers, one cloud per finish group. Decorative chrome is highlighted; hover a dot for its name or open the full map.

02550751000255075100Corrosion protection (0–100)Surface hardness (HV, log scale, 0–100)Plating — 19 finishesHard coatings — 17 finishesAnodize & conversion — 8 finishesPaint & powder — 7 finisheshard, low corrosion protectionhard and protectiveprotective, softsoft, little protectionType II anodize — corrosion 71, hardness 54BSA anodize — corrosion 71, hardness 52Type I anodize — corrosion 71, hardness 49Hard anodize — corrosion 71, hardness 61PTFE hard anodize — corrosion 71, hardness 61Nitriding — corrosion 55, hardness 73PEO — corrosion 70, hardness 74Sherardizing — corrosion 83, hardness 56Brass plate — corrosion 35, hardness 44Bronze plate — corrosion 40, hardness 49Cadmium plate — corrosion 70, hardness 26Copper plate — corrosion 32, hardness 39Electroless copper — corrosion 20, hardness 41Electroless nickel — corrosion 70, hardness 68Nickel plate — corrosion 51, hardness 55Gold plate — corrosion 68, hardness 39Hard chrome — corrosion 40, hardness 73Hot-dip zinc — corrosion 90, hardness 42Nickel-PTFE — corrosion 72, hardness 57Silver plate — corrosion 55, hardness 39Solder plate — corrosion 42, hardness 9Tin plate — corrosion 34, hardness 0Zinc plate — corrosion 60, hardness 30Zinc-nickel — corrosion 86, hardness 60Cerakote — corrosion 83, hardness 27E-coat — corrosion 83, hardness 15Epoxy coat — corrosion 83, hardness 15Powder coat — corrosion 83, hardness 14Wet paint — corrosion 59, hardness 10AlCrN PVD — corrosion 58, hardness 93AlTiN PVD — corrosion 52, hardness 94CrN PVD — corrosion 62, hardness 83DLC — corrosion 55, hardness 93MoS2 PVD — corrosion 20, hardness 26TiAlN PVD — corrosion 50, hardness 93TiCN PVD — corrosion 40, hardness 92TiB2 PVD — corrosion 40, hardness 94TiN PVD — corrosion 45, hardness 87WC/C PVD — corrosion 48, hardness 77ZrN PVD — corrosion 52, hardness 90CVD alumina — corrosion 70, hardness 85CVD TiCN — corrosion 38, hardness 92CVD TiN — corrosion 45, hardness 87Multilayer CVD — corrosion 62, hardness 88HVOF coating — corrosion 78, hardness 77Plasma spray — corrosion 60, hardness 68Plastic chrome — corrosion 72, hardness 71Electroless plastic — corrosion 58, hardness 39Clear coat — corrosion 20, hardness 12Soft-touch — corrosion 20, hardness 5PLATINGHARD COATINGSANODIZE & CONVERSIONPAINT & POWDERNickel plateHard chromeType II anodizePowder coatZinc plateZinc-nickelDLCTiN PVDTin plateCadmium plateE-coatCerakoteWet paintHot-dip zincNitridingHVOF coatingDecorative chrome — corrosion 64, hardness 71Decorative chrome
02550751000255075100Corrosion protection (0–100)Surface hardness (HV, log scale, 0–100)Plating — 19 finishesHard coatings — 17 finishesAnodize & conversion — 8 finishesPaint & powder — 7 finishesType II anodize — corrosion 71, hardness 54BSA anodize — corrosion 71, hardness 52Type I anodize — corrosion 71, hardness 49Hard anodize — corrosion 71, hardness 61PTFE hard anodize — corrosion 71, hardness 61Nitriding — corrosion 55, hardness 73PEO — corrosion 70, hardness 74Sherardizing — corrosion 83, hardness 56Brass plate — corrosion 35, hardness 44Bronze plate — corrosion 40, hardness 49Cadmium plate — corrosion 70, hardness 26Copper plate — corrosion 32, hardness 39Electroless copper — corrosion 20, hardness 41Electroless nickel — corrosion 70, hardness 68Nickel plate — corrosion 51, hardness 55Gold plate — corrosion 68, hardness 39Hard chrome — corrosion 40, hardness 73Hot-dip zinc — corrosion 90, hardness 42Nickel-PTFE — corrosion 72, hardness 57Silver plate — corrosion 55, hardness 39Solder plate — corrosion 42, hardness 9Tin plate — corrosion 34, hardness 0Zinc plate — corrosion 60, hardness 30Zinc-nickel — corrosion 86, hardness 60Cerakote — corrosion 83, hardness 27E-coat — corrosion 83, hardness 15Epoxy coat — corrosion 83, hardness 15Powder coat — corrosion 83, hardness 14Wet paint — corrosion 59, hardness 10AlCrN PVD — corrosion 58, hardness 93AlTiN PVD — corrosion 52, hardness 94CrN PVD — corrosion 62, hardness 83DLC — corrosion 55, hardness 93MoS2 PVD — corrosion 20, hardness 26TiAlN PVD — corrosion 50, hardness 93TiCN PVD — corrosion 40, hardness 92TiB2 PVD — corrosion 40, hardness 94TiN PVD — corrosion 45, hardness 87WC/C PVD — corrosion 48, hardness 77ZrN PVD — corrosion 52, hardness 90CVD alumina — corrosion 70, hardness 85CVD TiCN — corrosion 38, hardness 92CVD TiN — corrosion 45, hardness 87Multilayer CVD — corrosion 62, hardness 88HVOF coating — corrosion 78, hardness 77Plasma spray — corrosion 60, hardness 68Plastic chrome — corrosion 72, hardness 71Electroless plastic — corrosion 58, hardness 39Clear coat — corrosion 20, hardness 12Soft-touch — corrosion 20, hardness 5PLATINGHARD COATINGSANODIZE & CONVERSIONPAINT & POWDERNickel plateHard chromePowder coatZinc plateDecorative chrome — corrosion 64, hardness 71Decorative chrome
Anodize & conversionPlatingPaint & powderHard coatings

Specifications for Decorative chrome

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

StandardType / ClassThicknessRequirement / testStatus
ASTM B456
Standard Specification for Electrodeposited Coatings of Copper Plus Nickel Plus Chromium and Nickel Plus Chromium · ASTM
SC1≥ 10 µmMild indoor service; steel Ni-Cr system uses 10 µm minimum nickel. · Thickness, adhesion, and appearance.Active
SC2≥ 15 µmModerate service; steel uses 20 µm bright nickel or 15 µm duplex nickel. · Thickness, adhesion, and applicable corrosion test.
SC3≥ 25 µmSevere service; steel Ni-Cr system uses 25 µm minimum duplex nickel. · CASS or specified corrosion test plus thickness.
SC4≥ 30 µmVery severe service; steel Ni-Cr system uses 30 µm minimum duplex nickel. · CASS or specified corrosion test plus thickness.
SC5≥ 35 µmHighest service category; steel Ni-Cr system uses 35 µm minimum duplex nickel. · CASS or specified corrosion test plus thickness.

Drawing call-out

DECORATIVE COPPER-NICKEL-CHROMIUM PLATE PER ASTM B456, SERVICE CONDITION SC3, BRIGHT FINISH; SIGNIFICANT SURFACES AS SHOWN

Pattern: DECORATIVE <Cu-Ni-Cr|Ni-Cr> PER ASTM B456, SC<1|2|3|4|5>, CLASSIFICATION <SYSTEM CODE>, <APPEARANCE>

Which materials take Decorative chrome?

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

Material familyVerdictNotes
Brass
YesCommon decorative and electrical substrate after cleaning.
Copper Alloy
YesExcellent decorative plating substrate.
Steel
YesCommon over copper and nickel layers.
Aluminum
With careRequires zincate or equivalent activation plus a strike before the functional plate.
DMLS / SLM
With careMetal AM parts can be plated after density, powder, and porosity review.
Stainless Steel
With careRequires activation and nickel strike.
Zinc Alloy
With careDie castings need copper leveling and porosity control.
Magnesium Alloy
LimitedHighly reactive; needs a qualified pretreatment and is rarely plated this way.
Polymer
LimitedLimited to plateable resins and specialized pretreatment.
  • Plateable ABS is the standard choice.
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 Decorative chrome is applied, and what it does to the part

  1. 1Polish
  2. 2Clean and activate
  3. 3Copper plate if required
  4. 4Semi-bright and bright nickel plate
  5. 5Chromium plate
  6. 6Rinse
  7. 7Inspect appearance and corrosion class
DimensionsDesign for total copper-plus-nickel-plus-chromium buildup, often 10–40 µm per side, not only the chromium thickness.
Build-up per side10–40 µm — Total system buildup is dominated by nickel and optional copper, not the thin chromium topcoat.
MaskingUsually needed. Mask threads, fits, hidden rack-contact zones, and surfaces where the full multilayer buildup is unacceptable.
ElectricalConductive
AppearanceBright, blue-white mirror or satin metallic appearance.
Added lead time5–10 working days on top of the bare part

Design rules for Decorative chrome

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

  1. Specify ASTM B456 service condition.The environment determines the required multilayer system.
  2. Polish before plating.A mirror deposit magnifies scratches and waviness.
  3. Place rack marks on hidden faces.Reliable current contact leaves a visible witness.
  4. Avoid deep narrow recesses.Poor throwing power leaves thin nickel and chrome.

Decorative chrome versus the alternatives

Finishes engineers weigh against Decorative chrome, and when each wins.

FinishCorrosionHardnessCosmeticCostThicknessChoose it when
Decorative chrome
this page
647195$$$0.3–1 µm—
Electrolytic Nickel Plating
Decorative chrome vs Electrolytic Nickel Plating →
515578$$5–25 µmwhen a warm silver nickel appearance is acceptable
Hard Chrome Plating
Decorative chrome vs Hard Chrome Plating →
407345$$$$10–500 µmwhen thick functional wear resistance is required
CorrosionHardnessCosmeticLubricityEconomy
Decorative chromeElectrolytic Nickel Plating

The radar overlays Decorative chrome with Electrolytic Nickel Plating, its most common alternative — chosen when a warm silver nickel appearance is acceptable. Scores in the table are 0–100 across every finish in the catalog.

Cost, lead time and compliance

Relative cost

Decorative Nickel-Chrome 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 cross-checked against US job-shop pricing. The exact figure appears on the instant quote once the part is uploaded.

Lead time and compliance

Added lead time5–10 working days
RoHSCompliant
NotesFinished metallic chromium can comply, but conventional plating uses regulated hexavalent chromium; nickel release limits may apply to skin contact.

What Decorative chrome is used for

  • Automotive trim
  • Plumbing fixtures
  • Appliance controls
  • Furniture hardware
  • Plastic bezels

Decorative chrome — frequently asked

decorative chrome vs hard chrome

Decorative chrome is typically a 0.25–1.0 µm chromium topcoat over much thicker nickel. Hard chrome is commonly 10–500 µm of chromium for wear and is often finish-ground.

how thick is decorative chrome plating

The chromium itself is commonly about 0.25–1.0 µm. Total buildup can be 10–40 µm because copper and nickel underlayers provide leveling and corrosion protection.

why is nickel under chrome plating

Nickel supplies brightness, leveling, and most corrosion resistance. The thin chromium layer mainly adds the blue-white color, tarnish resistance, and surface hardness.

can plastic be chrome plated

Yes, plateable ABS and selected ABS/PC grades can be etched, catalyzed, electrolessly metallized, then copper-nickel-chrome plated. Total metallic buildup is much greater than the 0.25–1.0 µm chromium topcoat.

why does chrome plating peel

Peeling usually traces to contamination, passive oxide, poor activation, or incompatible substrate preparation. Casting porosity and flexing plastic can also break adhesion even when the topcoat looks acceptable initially.