Pump Impeller Tungsten Carbide Coating for Slurry and Seawater Pumps

Application fields:

Slurry pumps in mining and mineral processing, dredging and sand handling pumps, seawater and desalination pumps, chemical process pumps, and circulating pumps handling solids-laden media.

Technical principles and processes:

The impeller is stripped of any previous coating, inspected for cracks, and grit blasted. Worn areas are rebuilt to profile where required, then a HVOF tungsten carbide coating is applied to the vane faces, leading edges and hub. The impeller is dynamically checked and finish ground so the flow passages stay within tolerance.

Coating performance:

Micro-hardness 1100-1400 HV for erosion resistance
Coating thickness 0.20-0.50 mm in high-wear zones
Erosion rate reduced by 60-80% versus uncoated cast iron
Pump efficiency and head recovered on worn impellers
Balanced, ground finish so vibration stays within limits

水泵叶轮碳化钨涂层加工：针对含砂、矿浆、海水等磨蚀工况，对叶片流道与轮缘做超音速火焰喷涂碳化钨，既可修复磨损叶轮，也可用于新件预保护。

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