Solutions - Pump Impeller Erosion Repair Using Elastomeric Coating
Pump Impeller Erosion – A Major Cause of Pump Failure
Pump impellers operating in high-velocity fluids are constantly exposed to erosion, cavitation, and abrasive particles. Over time, this results in metal loss, surface pitting, and deformation of blade geometry.
Common causes of impeller erosion include:
Cavitation bubble collapse
Abrasive particles in slurry or seawater
High flow velocity
Hydraulic turbulence at the leading edge
These mechanisms gradually degrade the impeller surface, leading to reduced pump efficiency and increased energy consumption.
Conventional Repair Limitations
Traditional repair methods include:
Welding build-up
Metal machining
Epoxy filler repair
However, these approaches often fail because they restore the metal but do not protect it from future erosion.
Rigid repair materials also lack flexibility and quickly fail under cavitation impact.
Advanced Elastomeric Coating Solution
MetaLine Series 700 provides an advanced elastomeric erosion protection system specifically designed for hydraulic components.
Instead of resisting impact through hardness, the coating absorbs the hydraulic energy, preventing damage to the underlying metal.
Key properties
High elasticity and impact absorption
Excellent abrasion resistance
Strong adhesion to blasted steel
Resistance to cavitation damage
This makes MetaLine Series 700 particularly effective for impeller blade protection and restoration.
Impeller Repair Process
Typical repair procedure includes:
Inspection and damage assessment
Abrasive blasting to SA2.5 cleanliness
Metal restoration if required
Elastomeric coating application
Quality Check
Once applied, the coating forms a flexible protective barrier that shields the impeller surface from erosion and cavitation.
Benefits
Operators using elastomeric protection for pump impellers typically achieve:
Longer pump service life
Reduced maintenance downtime
Improved hydraulic performance
Lower spare part costs