Thermal coatings
All Griekspoor coatings are marketed under the trade name TOPCOAT®. All TOPCOAT® coatings meet the demands of the latest version of the NBD 10300, the coating specification for (ceramic) coatings developed and used by the Dutch department of waterways.
"Thermal coatings" are 'hard' coatings. These coatings are thermally applied: with the use of an energy source the coating material is applied to the product. GTC uses plasma, HVOF (High Velocity Oxygen Fuel), and laser as an energy source. This results in a hard coating, extremely wear-resistant and corrosion-resistant, that is finished to the specified fit and roughness. Griekspoor Thermal Coatings coats products up to a length of 23 meters, a diameter of 1 meter, and a weight of 20 tonnes.
| Trade name | Coating material |
Bond layer | Top layer | Coating properties | € | ||
| Wear | Corrosion | Chemicals | |||||
| Ceramic | NiCr alloy 100µm (900µm) |
Al2O3/TiO2 200µm (800µm) |
++ | ++ | +½ | 100% | |
| Ceramic | TOPCOAT® 177 100µm (3000µm) |
Al2O3/TiO2 200µm (800µm) |
++ | +++ | +++ | 120% | |
| Ceramic | NiCr alloy 100µm (900µm) |
Cr2O3 200µm (600µm) |
++½ | ++ | ++ | 135% | |
| Ceramic | TOPCOAT® 177 100µm (3000µm) |
Cr2O3 200µm (600µm) |
++½ | +++ | ++++ | 155% | |
| Carbide | --- | Cr3C2 150µm (300µm) |
+++ | +½ | +½ | 130% | |
| Carbide | TOPCOAT® 177 150µm (3000µm) |
Cr3C2 150µm (250µm) |
+++ | +++ | +++ | 175% | |
| Carbide | --- | WC 150µm (250µm) |
++++ | +½ | + | 185% | |
| Carbide | TOPCOAT® 177 150µm (3000µm) |
WC 150µm (250µm) |
++++ | +++ | ++½ | 230% | |
| Nickel based | --- | Superalloy 100µm (3000µm) |
□ | ++++ | ++++ | 100% | |
| Carbide | --- | TOPCOAT®177/WC 125µm (600µm) |
+++ | +++ | ++½ | 110% | |
|
TOPCOAT® LC 625 |
Inconel | --- | Inconel 625 400µm (1200µm) |
-/-- | +++ | +++½ | 400% |
|
TOPCOAT® LC 177 |
Nickel based | --- | TOPCOAT®177 400µm (1200µm) |
□ | ++++ | ++++ | 450% |
| (Coating thickness between "(µm)" is max. coating thickness) | |||||||
*Ceramics is Seals have to be checked. Seal Construction as on page is advised.
** Thicker bond coat equals better corrosion resistance.
*** Thicker if necessary (on request)
TOPCOAT® ceramic coating (TC)
TOPCOAT® Our 'standard' TOPCOAT® is our earliest developed coating and is applied since 1987. For a number of years this was the only coating that could be supplied for hydraulic applications. (They can choose any colour as long as it is black).…
TOPCOAT® ULTRA ceramic coating (TCU)
TOPCOAT® Ultra This ceramic coating is mainly used where a very high degree of chemical resistance against strong acids or bases is required. The coating is tribologically similar to the standard TOPCOAT®. The colour is dark grey/green. The coating…
TOPCOAT®+ ceramic coating (TC+)
TOPCOAT®+ This coating is similar to TOPCOAT® ceramics, however the plasa sprayed nickel-chrome based adhesive layer is replaced by an HVOF sprayed nickel based superalloy (TOPCOAT® 177). As a result the corrosion resistance, chemical resistance,…
TOPCOAT® ULTRA+ ceramic coating (TCU+)
TOPCOAT® Ultra+ This coating is similar to TOPCOAT® ULTRA, however the plasma sprayed nickel-chrome based adhesive layer is replaced by an HVOF sprayed nickel based superalloy (TOPCOAT® 177). As a result the corrosion resistance and resulting…
TOPCOAT® CCR, Chromium Carbide metallic HVOF coating
TOPCOAT® CCR TOPCOAT® CCR is especially developed as a better alternative to electrolytically applied (nickel-)chromium. It is a single layer chromium carbide. A major advantage is that no 6-valent chromium is formed during production. There are…
TOPCOAT® CCR+, Chromium Carbide metallic HVOF coating
TOPCOAT® CCR+ TOPCOAT® CCR+ consists of a TOPCOAT® 177 UHCR (nickel based superalloy) HVOF sprayed intermediate coating and a chromium carbide top coating, namely TOPCOAT® CCR. As a result the corrosion resistance and therefore the operational…
TOPCOAT® WCR, tungsten carbide metallic HVOF coating
TOPCOAT® WCR TOPCOAT® WCR (tungsten carbide) coating is especially developed as a hard chrome replacement, a better alternative to electrolytically applied (nickel-)chromium, when extreme wear resistance is required. A major advantage is that no…
TOPCOAT® WCR+, Tungsten Carbide metallic HVOF coating
TOPCOAT® WCR+ TOPCOAT® WCR+ consists of a TOPCOAT® 177 UHCR intermediate coating, a nickel based superalloy, and a tungsten carbide top coating, namely TOPCOAT® WCR. As a result corrosion resistance and operational reliability are improved while…
TOPCOAT® 177
TOPCOAT® 177 TOPCOAT® 177 UHCR (Ultra High Corrosion Resistant) is an in house developed intermediate coating. This nickel based superalloy's main purpose is to attain optimum corrosion resistance in highly chemical environments with high…
TOPCOAT® 107
TOPCOAT® 107 Alternative for nickel chrome TOPCOAT® 107 is the economic alternative for nickel chrome plating. Even though the costs of both alloys are similar, the corrosion resistance and wear resistance for TOPCOAT® 107 are significantly better…
Griekspoor piston positioning system LPM® (Linear Position Measurement)
Griekspoor piston positioning system LPM® (Linear Positioning Measurement) The Griekspoor Linear Positioning Measurement system (LPM) is composed of a combination of one special sensor and a rod with a specific profile below the coating surface.…