Improve reliability and durability on hydraulic
cylinders in extreme conditions


Maritime cranes solutions

Griekspoor Thermal Coatings develops, tests and applies hard coatings to provide the underlying product with optimal protection against corrosion and/or wear.

These coatings are marketed under the trade name TOPCOAT®. Our coatings are thermally applied: with the use of an energy source the coating material is applied to the product. We use plasma, HVOF (High Velocity Oxygen Fuel), and laser as an energy source.


Extremely wear-resistant and corrosion-resistant, that is finished to the specified fit and roughness.


  1. Free of chromium(VI)
  2. Length of 23 metres
  3. 1 metre diameter
  4. A weight of 20 tonnes


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Reliability and durability

The search for replacement of products with hexavalent chrome, chromium(VI), is an important current issue in today’s market. Its specific compound of alloying elements assures that our coating’s material is free of chromium(VI).


A homogenous surface roughness is key in situations
where piston rods are used 24/7 under severe circumstances.


Wear resistance of a coating is the result of combined hardness and toughness. With an intelligent chemical composition we achieved a very high corrosion resistance and wear resistance, much higher than that of (nickel) chrome plating. The composition of the coating is based on an alloy with nickel and carbides.


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Maximize daily operations

Uptime is key. A superbly durable coating with extremely high corrosion resistance and wear resistance when exposed to erosion, friction and cavitation. But there is more. Small impact damage can easily be repaired by simple welding. Without compromising on reliability.

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Mobile cranes

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Port cranes

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Ship cranes

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Special cranes

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Testing to extremes

We have accomplished an endurance test in the sea harbour of Singapore. The rods were hung 18 months long in the tide zone, a test cycle of 6 hours under water and 6 hours above the water line, with an average temperature of more than 30°C. After removing this fouling, a stain- and corrosion free coating surface appeared for both coatings.

The corrosion resistance is constantly tested in our laboratory using standardised corrosion tests: (acidic) salt spray testing, electrochemical porosity testing, and the plotting of polarisation curves. During testing we also take into account other important factors such as wear resistance, hardness, and dynamic bending strength. With a hardness of 950-1400HV and a dynamic bending resistance of 600N/mm2 we can let the results speak for themselves.