Product/Service

Platings and Coatings

Source: Flite Technology Inc.
Chrome Plating (Mil Spec QQ-C-320)

Industrial hard chrome, not decorative bright chrome. Chrome is deposited on metallic surfaces submerged in a chromic acid plating bath. Direct current

Chrome Plating (Mil Spec QQ-C-320)

Industrial hard chrome, not decorative bright chrome. Chrome is deposited on metallic surfaces submerged in a chromic acid plating bath. Direct current from a power supply is incorporated. The part to be plated is made cathodic by connection to the negative terminal of a rectifier. Inert lead anodes are made electronically positive voltage is applies across the two and current flows through the solution and the chromium is deposited on the metal.

Attributes

  • Corrosive resistant
  • Abrasive resistant
  • Replatable
  • Very low coefficient of friction
  • Melting point exceeds 2930 F
  • Remains bright to 1200 F
  • Rockwell hardness 65 to 70 C
  • Can be applied thick to correct dimensional problems
  • Blemish free surfaces
  • Thickness from .0005 to .020" for thicker for special applications
  • Anti galling properties
  • Good bonding properties
  • Proprietary baths and processes available
Problems
  • Hydrogen embrittlement of part may occur if not handled properly.
Cromex-24

A special application and process of applying Industrial Hard Chrome. Screws are polished and plated three different times.

Attributes

  • Very hard surface
  • Non porous, gases cannot seep through
  • Corrosion resistant
  • Abrasive wear resistant to resins
  • Prevents root pitting
  • Smooth polymer flow surfaces
  • High temperature resistant
  • Prevents degradation
  • Prevents burning
Problems
  • Quite hard to strip before next rebuild or repair.
High Velocity Oxy-Fuel (HVOF)
2,500 FT a second velocity

The possibilities here are endless, Moly/Nickel/Chrome, Moly/Silicon/Borons, Chromium Carbide/Nickel/Chromium, Stellite and Colmonoy applications etc.

If you have a special abrasive or corrosion problem, where conventional plating, treating and coatings haven't worked, this may be the way to go.

Attributes

  • High density
  • Hard smooth coating
  • Extremely wear resistant
  • Oxidation resistant
  • Bond strength exceeds 10,000 PS1
  • Dimensional restoration
  • Fretting wear resistance
  • Crack free
  • Low heat prevents distortion
  • Excellent for glass fiber applications
  • No metal dilution of coating to feed screw
  • Interlocking lamination
A brief description of a few of hundred of HVOF Coatings available from Flite Technology.

"THE COATINGS"
Coatings Hardness Description

  • FTXC1000 Rc 68-70 A composition of Cobalt saturated with 80-90% Sub-Micron sized Tungsten Carbide with a particulate hardness average of Rc 82, providing ultimate abrasion resistance.
  • FTXC2000 Rc 70-74 An Oxide of Chromium combined with an Oxide of Silicon providing extreme abrasion resistance and hardness.
  • FTXC3000 Rc 65 An Oxide of Aluminum producing very hard, dense, and smooth coatings. Resists very fine particulate abrasion. Corrosion resistant.
  • FTXC4000 Rc 55-65 A composition of Nickel, Chromium, and Chromium Carbide producing an abrasion resistant coating with extreme corrosion resistance and excellent ductility, relative to hardness.
  • FTXC5000 Rc60 A proprietary composition of Molybdenum and Tungsten Carbide producing unique antigalling and abrasion resistance.
  • FTX6000 Rc55-60 A Nickel-Chrome-Boron alloy system combined with 50-60% Tungsten Carbide providing extreme abrasion and corrosion resistance.
  • FTXC7000 Rc 60 A Nickel-Chrome-Boron Alloy system similar to "56", only much more abrasion resistant.
  • FTXC8000 Rc 58 A Cobalt base alloy system similar to Stellite 12, only much more abrasion resistant.
  • FTXC-RD Rc 75-80 Tungsten Carbide/Cobalt; A unique sub-micron manufacturing process providing improved wear resistant over the traditional Wc/Co coating.
Nickel, Electroless (Mil Spec C-26074)
Deposit without using electric current.

Attributes

  • Plating not dependent on current density, polarization or throwing power
  • Uniform thickness and composition
  • Corrosion resistance
  • Good wearing surface
  • Non porous
  • Moderately hard
  • Can be heat treated for greater abrasive resistant properties
Problems
  • Not for extreme abrasion applications
Nickel, Electrolytic
(Mil Spec QQ-N-290)

Used strictly for corrosion problems. Coating is continuous and a good under coat for industrial hard chrome.

Attributes

  • Moderately dense
  • Very Decorative
  • Moderately Hard
  • Good Thermal Properties
  • Corrosion Resistant
  • Non Porous
  • Uniform Coating Thickness
Problems
  • Not Abrasive Resistant
  • Tarnishes
Tungsten Coating
D-Gun Application
Original Union Carbide (UCAR)
Now Praxair

This patented D-Gun process shoots the powder composition onto the screw at hypersonic speeds. Coating is .002" to .003" thick. Most common coating they offer for screws is LW-IN30, 87% Tungsten and 13% Cobalt Matrix.

Attributes

  • Moderately dense
  • Extremely abrasive resistant
  • Excellent for fiber filled applications
Problems
  • Slightly porous
  • Rough finishes
  • Feeding problems
  • Screws must be nickel base hardfaced on
  • Flights prior to coating application
  • Selected repairs not possible
  • Process magnified pinholes, very expensive

Flite Technology Inc., 408 A Hawk Street. Tel: 800-327-9310; Fax: 321-631-2331.