Approved & Certified By

LR
DNV
BV
ABS
NK
RINA
LR
DNV
BV
ABS
NK
RINA
Marine Electroplating — Est. 1987

Your current plating
is costing you
drydock days.

Zinc-nickel electrodeposition for propeller shafts, rudder stocks, and hull hardware. Up to 7,200 hours salt spray — classification-compliant coatings that keep vessels earning, not waiting.

Request Your Coating AuditDownload Salt Spray Data (PDF)
7,200+hours
Salt Spray Rating
10×more
vs. Standard Zinc
75µmmin
Coating Thickness
100%
Classification Ready
Audit 01 — Adhesion & Coverage

The checkpoint gap starts
at the surface.

Before a single hour of salt spray, adhesion and thickness uniformity determine whether a coating survives the first drydock interval.

Standard Zinc Spray

8 checkpoints

Thermal / arc-spray zinc application

Surface preparation (abrasive blast)Sa 2.5
Adhesion strength3–5 MPa
Coating thickness uniformity±30%
Coverage on complex geometryPoor
Post-application cure time24–48 hrs
Initial salt spray resistance200 hrs
Hydrogen embrittlement riskModerate
Classification society acceptedVaries
VS
Recommended

Electrodeposited Zinc-Nickel

14 checkpoints

Alkaline bath pulse-plating process

Electrolytic surface activationFull
Adhesion strength18–22 MPa
Coating thickness uniformity±5%
Coverage on complex geometryExcellent
Post-deposition cure time2 hrs
Salt spray resistance7,200+ hrs
Hydrogen embrittlement riskMinimal*
Classification society acceptedLR / DNV / BV
Nickel content range12–16%
Thermal stability180°C
Corrosion creep from scribe<1mm
Sacrificial protection layerActive
Nanocrystalline microstructurePulse-plated
Thickness certificate issuedYes

* Pulse-plated nanocrystalline microstructure reduces hydrogen diffusion probability. ASTM B117 test data available on request.

Audit 02 — Corrosion Performance

The salt spray
numbers speak.

Eight performance metrics measured under ASTM B117 conditions. Pulse-plated zinc-nickel consistently outperforms standard zinc by a factor of 10× or more.

18×
Longer Salt Spray Life

7,200 hrs Zn-Ni vs. 400 hrs standard zinc spray. Tested on actual marine component substrates.

±5%
Thickness Tolerance

Uniform deposition across complex propeller shaft geometries. Standard spray: ±30%.

Salt Spray Hours (ASTM B117)
Std. Zinc200–400 hrs
Zn-Ni7,200+ hrs
Red Rust Onset (coated panels)
Std. Zinc400 hrs
Zn-Ni7,200+ hrs
Red Rust Onset (coated bolts)
Std. Zinc500 hrs
Zn-Ni8,000+ hrs
Corrosion Creep from Scribe
Std. Zinc4–8 mm
Zn-Ni<1 mm
Nickel Content (alloy)
Std. ZincN/A %
Zn-Ni12–16 %
Hardness (Vickers)
Std. Zinc70–100 HV
Zn-Ni180–250 HV
Thermal Stability
Std. Zinc120 °C
Zn-Ni180 °C
Coating Thickness Tolerance
Std. Zinc±30 %
Zn-Ni±5 %

DATA SOURCE: ASTM B117 salt spray chamber testing. Pulse-plated Zn-Ni panels, 12–16% Ni content, alkaline bath process. All data independently verified. Full test reports available to classification societies on request.

Audit 03 — Classification Compliance

Seven compliance checkpoints.
Standard zinc fails four.

Classification societies don't grade on a curve. Every requirement below maps to a surveyor's checklist — the same one your vessel faces at the next drydock.

Requirement
Authority
Std. Zinc
Zn-Ni
Minimum salt spray hours for seawater service
DNV-RU-SHIP
~CONDITIONAL
✓PASS
Coating thickness certificate (µm)
Lloyd's Register
~CONDITIONAL
✓PASS
Adhesion test (pull-off method)
Bureau Veritas
✗FAIL
✓PASS
Hydrogen embrittlement risk assessment
ABS / IACS UR W7
~CONDITIONAL
✓PASS
Sacrificial anode compatibility
ClassNK / IACS
✗FAIL
✓PASS
Environmental compliance (RoHS / REACH)
EU / IMO
✓PASS
✓PASS
Uniform thickness on threaded components
ASTM B633 / ISO 2081
✗FAIL
✓PASS

The performance gap is now on record. Request your vessel-specific coating audit.

Request Your Coating Audit
Coating Audit Request

Tell us about your vessel.
We'll run the numbers.

A senior coating engineer reviews every submission. You'll receive a component-specific specification sheet within 48 hours.

Coating Audit Form

Response within 48 hours · No commitment required

Salt Spray Test Data (PDF)

Full ASTM B117 dataset — 7,200-hour panel results, bolt specimens, and comparative zinc-spray baselines. 18 pages.

Why Engineers Choose MarinePlate

🔬

Alkaline bath pulse-plating — no hexavalent chromium, REACH compliant

📋

Thickness certificates issued post-deposition for every job

⚓

Scheduled around drydock windows — 72-hour turnaround available

🛡️

LR, DNV, BV, ABS, and ClassNK approved process documentation

DIRECT LINE — PROCUREMENT

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