Marine and Aerospace

Marine

Our portable plating process can be taken on board ships for in-place repairs of large, difficult-to-move components such as bearing journals, propeller shafts, bearing seats, and turbine casings.

Applications

  • Pumps: bearing housings, impeller bores, shaft bearing journals and seal areas
  • Valves: gates, discs, valve stems, seal rings
  • Propulsion components: propeller (line) shaft journal and seal areas, line shaft bearings, bearing saddles
  • Electrical: motor generator bearing housings, rotor journals, commutators, bus bars
  • Power generation: steam turbine bearing journals, flange faces, diesel engine cylinder liners, connecting rod bores, crankshaft journals
  • Structural: watertight door knife edge sealing areas, hatch covers, hull inserts, access doors
  • Hydraulics: steering gear cylinders and rods

Aerospace

Deposits utilized on aerospace components include:

  • Nickel for pre-braze operations, wear resistance, dimensional restoration and corrosion protection.
  • Cadmium coatings for corrosion protection are available as LHE® (Low Hydrogen Embrittlement) formulations that do not require post-baking.
  • Zinc-Nickel and other alloys are available as alternatives to cadmium coatings.
  • Type I, II and III Anodizing coatings used to process components of engines, actuators, landing gear and airframes, increasing their ability to perform and extending overall in-service life.
  • Cobalt Chromium Carbide provides superior wear resistance and high temperature oxidation protection on engine components.
  • AeroNikl sulfamate nickel provides defect-free, adherent, high quality nickel deposits in three hardness levels (250, 400, and 575 Hv).

Common Process Applications

  • Corrosion Protection: On-site touch up coatings for corrosion protection with Cadmium LHE®, Cadmium No Bake® and Zinc-Nickel LHE™ allow repairs to be made in place and with minimum to no disassembly required. SIFCO offers portable travel kits for AOG repairs of cadmium, nickel, zinc-nickel, and tin zinc.
  • Pre-Braze: Turbine blades, turbine vanes, turbine stators and frames are nickel plated to ensure proper wetting of the surfaces to be brazed. Compared to other methods of applying the intermediate nickel layer, selective plating, is faster, more consistent, and more cost effective. Selective plating for prebraze also provides an atomic bond and superior wettability as compared with nickel shot blasting. In the case of exotic alloys, such as Renes and Inconels, selective plating is the preferred method of prebrazing
  • Surface Enhancement: OEM applications use nickel or a nickel alloy to improve hardness and wear resistance of the component.
  • Refurbishment: MRO applications use nickel or sulfamate nickel for dimensional restoration of an inside or outside diameter on the component.
  • Anodizing: Repair applications replace worn or damaged hardcoat with a new, anodized hardcoat coating. Selective anodizing is also offered for OEM applications.

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