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Pre-Gold Bath, Prod-ID: NC230

Pre gold bath NC230 NanoCraft Coating GmbH

NC230 is a strongly acidic alloy electrolyte for the adhesive direct gold-plating of stainless steel. It is preferably used for chromium-nickel steels, molybdenum steels and nickel based alloys difficult to activate. Because of its highly activate impact it can be used successfully for passive material which is difficult to plate. The gold electrolyte generally improves the adhesive properties between base material and galvanic surface. The gold electrolyte is suitable for both strike gold layers and thick coatings in the decorative field. The coatings are low in pores and protect against corrosion. The alloy electrolyte can be used for rack and barrel.

Gold content: 3 g Au/1000 ml

Catalogue catalog


Hard gold electrolyte for the direct gold-plating of stainless steel

Low-pore and crack-free coatings

Suitable for strike gold layers as well as for thick coatings

Good throwing power

Suitable for rack and barrel


Jewellery & Watches

Household articles

Writing implements

Spectacle frames


Technical Specifications

Electrolyte characteristics

Electrolyte type Strongly acidic
Metal content 3 g/L Au
pH value 1.3 (0.6 - 2)
Operating temperature Room Temperature, up to max. 40°C
Current density range 2 - 6 A/dm2
Plating speed 0.04 - 0.15 μm/min
Anode material MMO (RuO2-TiO2) or Pt-Ti

Coating Characteristics

Coating Gold-Cobalt
Alloy composition 99.7 wt. % Au, 0.3 wt. % Co
Color of deposit Yellow
Brightness Bright
Hardness of deposit 165 HV
Max. Coating Thickness Approx. 2 μm
Density of the coating Approx. 17.5 g/cm3