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Increased protection for chrome plated engineered components is now possible by sealing the micro-crack porosity in the chrome plate with C-Ramic's densification process C-Ramachrome. Hard chrome plating is often used for wear and corrosion protection, but has the inherent weakness of a microcrack network - fissures and porosity sufficient to allow corrosive fluids to penetrate to the substrate/chrome interface, attacking it and subsequently causing debonding of the plating.

Any debonded flakes of chromium will still retain their hardness and if caught up in seal areas, will behave as large grinding particles - scoring and scouring the surface that it was expected to protect.

C-Ramic's densification process is applied to the chrome-plated area, then thermochemically converted into a ceramic, which also bonds the C-Ramachrome to both the chrome plating and the substrate.

This process can be applied to virtually any part, which can be chrome plated, including internal diameters. During application, the C-Ramachrome solution is drawn into all existing open pores and cracks in the plating. The thermochemical reaction bonds the solution to the walls of the voids and fills the pores and cracks.

The resulting plating cannot be penetrated by corrosives, as there are now no open pores to allow infiltration.
By diffusing the C-Ramachrome into and filling the porosity of chrome plate, the measurable hardness is increased from an ordinary 850 Vickers to 1050 Vickers.

Technical: HARD CHROME PLATE C-RAMACHROME
HARDNESS 750 - 850 Vickers 1050 Vickers
POROSITY 5 - 10% Sealed
BOND MECHANISM Mechanical Thermochemically enhanced
BOND STRENGTH + 4,000 psi  
CORROSION RESISTANCE 12 - 24 hours (Salt Spray) Over 1000 hours (Salt Spray)

A range of C-Ramic formulations have been tested under laboratory conditions to Australian Standard AS1580, Method 452.2 and 'Resistance to Corrosion, Salt Water Droplet Test'. These formulations all showed excellent resistance to chemical attack from salt-water spray. Mild steel test panels and rods coated with C-Ramachrome showed no sign of attack after 1000 hours on test. Continuous immersion for > 1900 hours in 10% sodium chloride solution (three times the concentration found in sea water) could not break the protective barrier offered by the C-Ramachrome process.

Scanning electron microscope pictures, in conjunction with energy dispersive chemical analysis (EDAX), of surfaces treated with C-Ramachrome show the complete filling of porosity and corrosion studies in salt water environments demonstrate the sealant nature of C-Ramachrome.

  • No measurable buildup on the existing surface
  • No pre-grinding required
  • Increases chrome plating life by 4 to 10 times in most corrosive environments
  • Increased bond strength
  • Increased compressive strength

C-RAMIC filled chrome-plate can be considered a new cermet material with remarkable properties that extends chrome plating to new levels of performance.

If you require extended performance from any chrome plated components,
contact the experts at C-Ramic.