Colmonoy® nickel-based alloys and Wallex® cobalt-based alloys extend the life of pump parts subject to severe wear and erosion, such as in mining, oil & gas, or chemical processing industries. Colmonoy® and Wallex® can be used to repair worn or apply to new pump parts such as pump impellers, casings, wear rings, shafts, and bearings in slurry pumps, chemical pumps, and high-temperature pumps.
Pump parts experience different types of wear depending on the specific conditions and the type of pump. Some common types of wear include:
Abrasive wear: This type of wear occurs when hard particles or fluids containing solids are present in the pumped liquid. The hard particles can cause erosion or scratching on the surface of the pump parts.
Corrosive wear: This type of wear occurs when the pumped liquid is chemically aggressive and can cause corrosion on the surface of the pump parts.
Cavitation wear: This type of wear occurs when the pressure of the pumped liquid drops below the vapor pressure, causing bubbles to form and then collapse on the surface of the pump parts. This can cause pitting, cracking, or erosion on the surface of the pump parts.
Fatigue wear: This type of wear occurs due to repeated stress cycles on the pump parts. This can cause cracks or fractures on the surface of the pump parts.
Fretting wear: This type of wear occurs due to small relative motions between two surfaces in contact, resulting in surface damage, corrosion, and particle generation.
Thermal wear: This type of wear occurs due to the difference in thermal expansion between two materials in contact, resulting in a loss of material on the surface of the pump parts.
Pump components face a range of wear issues when in service. Particularly in the oil & gas, mining and chemical processing industries, pumps can be exposed to arduous service conditions which can affect both the service life and operational efficiency of the pump. Without the use of special alloys, like Colmonoy® and Wallex®, parts can have a very short lifespan.
Down Hole Pump Plunger Being Sprayed and Fused with Colmonoy® 6200
Colmonoy® nickel and Wallex® cobalt hardfacing alloys are often used in applications where the pump components are exposed to abrasive or erosive fluids, high-temperature environments, or corrosive chemicals. Applications include pump impellers, casings, wear rings, shafts, and bearings in slurry pumps, chemical pumps, and high-temperature pumps.
Colmonoy® nickel and Wallex® cobalt hardfacing alloys offer high resistance to wear, corrosion, and high-temperature environments. They also have excellent weldability, which allows for easy deposition of the hardfacing material on the pump components. The specific type of hardfacing alloy used depends on the specific application and the type of wear or erosion that the pump components are subject to.
Colmonoy® has been applied to both new and worn pump parts since our beginnings in 1938. Over the years, we have developed new alloys in partnership with our customers based on evolving customer and market needs.
Colmonoy® nickel hardfacing alloys are often used in applications where the pump components are exposed to corrosive fluids, such as acids, alkalis, and saltwater. Colmonoy® can be used to hardface pump impellers, casings, wear rings, shafts, and bearings in chemical pumps, seawater pumps, and other applications where corrosion resistance is critical.
Colmonoy® offers high resistance to corrosion and wear. Colmonoy® alloys have good weldability, which allows for easy deposition on the pump components. Colmonoy® nickel hardfacing alloys are available in different formulations. The recommended alloy depends on the specific application and the type of wear that the pump components are subject to.
In addition to corrosion resistance, Colmonoy® nickel hardfacing alloys can also provide high-temperature resistance, making them suitable for use in high-temperature environments. They can also offer resistance to abrasion and impact, depending on the specific formulation of the alloy used.
Below are our Colmonoy® nickel-based alloys that have been reducing maintenance costs and extending pump parts.
For a recommended alloy based on your specific application, consult Technical Services:
Wallex® 50 applied to a valve stem by three Spraywelder™ Systems
Wallex® cobalt hardfacing alloy is used in applications where pump components are subject to severe wear and erosion. This type of hardfacing material is deposited on the surface of the pump components to create a wear-resistant layer that can extend the service life of the components and reduce maintenance costs.
Wallex® cobalt hardfacing alloy is often used in applications where the pump components are exposed to abrasive or erosive fluids, high-temperature environments, or corrosive chemicals. Wallex® can be used to hardface pump impellers, casings, wear rings, shafts, and bearings in slurry pumps, chemical pumps, and high-temperature pumps.
Wallex® cobalt hardfacing alloy offers high resistance to wear, corrosion, and high-temperature environments. Wallex® has a high melting point and retains its hardness at elevated temperatures, making it ideal for use in high-temperature applications. Wallex® also has good weldability, which allows for easy deposition of the hardfacing material on the pump components.
Additionally, Wallex® is known for its excellent resistance to impact and high-stress abrasion, which makes it a preferred choice for pump components subject to these types of wear. Wallex® cobalt hardfacing alloys are available in different formulations, and the specific type of alloy used depends on the specific application and the type of wear or erosion that the pump components are subject to.
Wall Colmonoy cobalt-based Wallex® alloys offer excellent corrosion and resistance at elevated temperatures. These alloys are widely used for the hard surfacing of pump components, and are commonly applied via PTA, thermal spray & HVOF. Several passes can be required, depending on the degree of dilution of the base material. Increasingly these are applied by laser cladding, which typically requires thinner deposits.
| Application Method | Colmonoy® Nickel-Based | |||
| Colmonoy® 88 | Colmonoy® 62 | Colmonoy® 69 | Colmonoy® 72 | |
| Fusewelder™ | ● | ● | ● | |
| Spraywelder™ | ● | ● | ● | ● |
| HVOF | ● | ● | ● | ● |
| Laser Cladding | ● | ● | ||
| PTA | ● | ● | ||
| Hardness (Rockwell HRC) | 59-64 | 55-64 | 58-63 | 57-62 |
| Abrasion Resistance | Excellent | Excellent | Excellent | Excellent |
| Corrosion Resistance | Excellent | Excellent | Excellent | Excellent |
| Application Method | Wallex® 6 | Wallex® 12 | Wallex® 21 | Wallex® 42 |
| Fusewelder™ | ● | |||
| Spraywelder™ | ● | |||
| HVOF | ● | ● | ● | ● |
| Laser Cladding | ● | ● | ● | |
| PTA | ● | ● | ● | |
| Hardness (Rockwell HRC) | 38-46 | 45-53 | 28-38 | 45-50 |
| Abrasion Resistance | Medium | Medium | Medium | Medium |
| Corrosion Resistance | Excellent | Excellent | Excellent | Excellent |
Ready to increase the service life of your pump components?
