Chemical, Petrochemical and Refining
HVOF coating to protect surfaces exposed to combined corrosion and erosion on process equipment such as pumps, valves, shafts/sleeves and thermowells.
In short: In chemical, petrochemical and refinery plants, pump shafts, valve surfaces and process components are exposed to the combined effect of corrosion and erosion. UMEK selects the appropriate protection system for the environment, using HVOF coatings and nickel-based alloy overlays.
Application Areas
Our Solutions for Chemical & Petrochemical
- HVOF corrosion and wear coatings
- WC-Co-Cr
- Cr₃C₂-NiCr
- Inconel 625 coating
- Pump shaft and sleeve restoration
- Refurbishment of valve components
- Coatings for thermowells and process equipment
- Protection of surfaces subject to combined corrosion/erosion
- Dimensional restoration + precision grinding
Typical Causes of Wear in Chemical, Petrochemical and Refining
Chemical corrosion
Acidic, alkaline and chloride-bearing media cause pitting and general corrosion on the surface.
Erosion-corrosion
Fluid velocity and particles, combined with corrosion, accelerate material loss.
Sealing surface degradation
Even minor damage on shaft and valve seating surfaces leads to leakage.
Which Part, Which Problem, Which Process?
| Part / equipment | Typical damage | Process considered |
|---|---|---|
| Pump shafts and sleeves | Corrosion, wear | HVOF Cr₃C₂-NiCr or WC-CoCr, precision grinding |
| Valve seats and body surfaces | Erosion, loss of sealing | HVOF or PTA, precision machining |
| Reactor and process internal surfaces | Chemical corrosion | Inconel 625 weld overlay |
| Compressor and piston rods | Wear | HVOF coating |
The process for each part is finalised through engineering assessment of its operating conditions, base material and damage condition. At our Ankara facility, application and final grinding are carried out in a single workflow.
Read Before You Decide
About Chemical, Petrochemical and Refining
Which alloy is selected for a corrosive environment?
Depending on the pH, chloride content and temperature of the medium, nickel-based overlays such as Inconel 625 or carbide coatings such as Cr₃C₂-NiCr and WC-CoCr are considered. Inconel selection is explained in our guide.
Is compliance with specifications and standards ensured?
When the customer specification and applicable standards are shared at the quotation stage, material and process selection is verified against these requirements.
Is coating enough for a pump shaft, or is a new one needed?
Depending on the wear depth and the condition of the shaft body, coating restoration is often faster than a new part; if there is cracking or distortion, replacement may be necessary.
Have a Project in the Chemical & Petrochemical Industry?
Send us the technical details of your part and we will prepare a quote with an engineering assessment within 24–48 hours.