DEMARTIN electroless nickel SiC

DEMARTIN electroless nickel SiC

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Chemical nickel coatings offer first-class protection against corrosion and wear. The electroless nickel coating makes the surface robust and durable, with a uniform coating thickness, even with more complex factory moulds.

Dispersion coatings with silicon carbide inclusions serve as wear protection coatings and to improve properties in terms of tribology.

Coating with extremely good abrasion resistance high matrix hardness of up to 1,000 HV good corrosion protection behaviour silicon carbide grain diameter of 0.001-0.002mm. Has a low coefficient of friction and scores points for its resistance to chemical stress.
Temperature resistance up to 500°C and true-to-size deposition of +/- 5-8% layer thickness tolerance

Chemical nickel coatings offer first-class protection against corrosion and wear. Electroless nickel plating makes the surface robust and durable, with a uniform coating thickness, even with more complex factory moulds.

Specifications

Coating material
Chemical nickel - SiC
Process type
currentless
Colour
silvery grey
Coefficient of friction**
depending on system
Application temperature [°C]
<500
Deposition temperature [°C]
<90
SiC content
up to 30%
Coating thickness typ.
5-50 µm +- 8%
Coating temperature
<95°C
Part size
up to 1000kg
up to 2000mm
FDA approval based on migration tests
Partial coating possible

Applications

  • Corrosion
  • Wear and tear

Physical properties

Density:
<7.5 g/cm3
Melting range:
900 °C - 1200°C
Thermal expansion:
1.3 x 10-5 /K
Thermal conductivity:
<3 W/mK
E-modulus:
110-190 +- 10 GPa

Mechanical properties

Particle size
0.5 - 2 µm
Particle density
< 40%
Mixture hardness
< 1000 HV0.02 annealed
< 700 HV0.02 as coated
Thermally stable
< 550°C
Excellent wear resistance
- Taber Abraser
- CS17 103Red.


<4 mg
Weight loss
Good corrosion resistance
-Salt spray test DIN 50021 <400h
-Kesternich test DIN 50018 7 cycles (SFW 2.0)
  • Low coefficient of friction

Coatable materials

  • Steel, stainless steel
  • Nickel and nickel alloys
  • Cu and alloys
  • Al and alloys
  • Ti and alloys


Hydrogen from the coating process can lead to hydrogen embrittlement. This should be avoided by the choice of materials or post-treatment at 180°C.

Industries

  • Medical technology
  • Machinery industry
  • Semiconductor industry / Semiconductors
  • Textile machinery industry
  • Energy and electrical engineering
  • Mould and tool making
  • Plant and apparatus engineering
  • Armaments industry
  • Automotive industry

Remarks

Processing behaviour after coating

  • Precision turning
  • Precision grinding
  • Pre-treatment:
  • Microblasting (optional)