Hard Chromium Plating
THE IDENTIFYING  FEATURES OF HARD CHROMIUM PLATING
 
Direct bonding to various types of base metals, like Steel, Cast iron etc.
  • High hardness   (typical range  62-65 HrC / 800-900 Hv)
  • Outstanding abrasion resistance
  • Low friction coefficient
  • Good protection from corrosion, even at high temperatures
  • Good properties of sheet release /  film in contact
  • The very fine morphology,  characteristic attribute  of the  galvanic process, allows to achieve a wide range of surface finish, from simple grinding to polishing until mirror finish with roughness values even below 0.01 my Ra
  • Tendency to  maintain the initial surface finishing quality  over time
 OUR CHROMIUM PLATING EQUIPMENT
 
RIF has adopted a special "Rotational Plating System" in horizontal baths which generates a number of advantages in comparison to the conventional technology.
The most important ones are: 
 
The drastical reduction of the gas inclusions within the chromium layer with the following benefits: 
  • Higher compactness
  • Superior resistance to corrosion
  • Reduced brittleness 
Uniform thickness of Chrome plating layer  with following advantages: 
  • Oriented and uniform micro-structure  
  • Reduction of  grinding times
  • Reduced risk of cracking
OUR MAIN APPLICATIONS   
  • Metal rolls in the supercalenders  (intermediate, king and queen roll )
  • Heated rolls of Soft Calenders
  • Paper guide rolls, smooth or grooved
  • Coating rolls and Size Press rolls
  • Drying and Cooling Cylinders, Paper and Plastic sector
  • Cylinders for "Cast-Coating" Plants
  • Calender rolls for PVC production
  • Casting rolls  PP type "Casting Wheel"
  • Cooling rolls for flame treaters for plastic BOPP film production
Our grinding service pre / post Chromium plating grants the attainment of very strict  geometrical tolerances and maximum final uniformity of the coating.
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