What is it?

Hard-surfacing is the application of a layer of nickel or cobalt wear-resistant alloy to a part for the purpose of extending the machine’s service life. Nickel or cobalt wear-resistant alloys are applied to reduce wear, abrasion, impact, erosion, or galling. This can be performed on worn parts to replace metal lost through wear and on new parts when wear is anticipated – mostly to prevent metal-to-metal wear. Hardsurfacing alloys can be deposited by welding and thermal spray processes.

What is the benefit?

Each year, millions of metal machinery parts are protected and restored with COLMONOY® nickel-based and WALLEX® cobalt-based Hard-Surfacing Alloys. Downhole drill bits, clamp plates, gate valves, pump plungers and pump parts for Oil & Gas, neck rings, guide rings, plates, plungers, bottle moulds for Glass Container manufacture, screw conveyors for Rubber & Plastics, industrial gas turbines for Power Generation, boiler tubes and panels for waste-to-energy and biomass plants, rollers in Steel Mills, valves for automotive and marine – and many, many more.

Parts protected with Wall Colmonoy’s nickel or cobalt hard-surfacing alloys – COLMONOY® and WALLEX® – last significantly longer than unprotected parts.

This means:

  • Fewer replacement parts needed
  • Less labor required to install them
  • Minimizes down-time

Galling, Abrasion, Corrosion, and Erosion

Application methods

COLMONOY® and WALLEX® alloys are applied in a wide range of proven hard-surfacing and thermal spraying techniques, including Laser Cladding, PTA, HVOF, Sprayweld™ and Fuseweld™.

In fabricating new parts, inexpensive base metals may be used because our COLMONOY® and WALLEX® nickel and cobalt hardfacing coatings withstand wear. To suit different application methods, our nickel and cobalt hard-surfacing alloys are available as powder, rods, wires and castings in a full range of sizes and specifications.

For consultation on how COLMONOY® and WALLEX® alloys can extend or restore the service life of your metal parts: