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 reliability is improved over CCR while maintaining the same wear resistance as CCR.

The CCR top coating is tribologically equivalent to an electrolytic (nickel-)chromioum coating. So surface roughness, lubrication, sliding properties, etc. are equal to (nickel-)chromium. Moreover, CCR+ is more resistant to corrosion than (nickel-)chromium, especially in sodium chloride, acidic, and alkaline environments, providing an excellent hard chrome replacement. However, hydrochloric acid environments are advised to be avoided.

TOPCOAT® CCR+ is also an excellent alternative in situations where the wear and corrosion resistance of WCR or WCR+ is required but the rod may suffer from occasional impact damage. The chromium carbide top coating is more resistant to impact damage than the tungsten carbide top coating of WCR or WCR+. Even if the top coating is damaged by impact, the underlaying TOPCOAT® 177 will protect the base material from corroding. 

 

Typical applications for CCR+ are the same as for CCR but when improved corrosion resistance is required for:

  1. Hydraulic parts, for instance piston rods
  2. Plungers
  3. Components for the automotive industry
  4. Wear resistant seal surfaces
  5. Wear resistant sliding bearings

 

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Used technique

HVOF spraying

HVOF spraying

When HVOF (High Velocity Oxygen Fuel) spraying fuel and oxygen are ignited. The flow of gas expands through a special nozzle and reaches a speed of more than 1,500 m/s. The coating powder is injected axially in the gas flow reaching extremely high…

 

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