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Erosion corrosion is the combined action of corrosion and

  • A.mechanical wear by a moving fluid
  • B.a steady tensile stress in the metal
  • C.an applied electrical current
  • D.high-temperature oxidation in dry air

Answer: A

Rapid or turbulent flow strips away the protective film as fast as it forms, so the metal never gets the chance to passivate. It is worst at bends, orifices and pump impellers, and reducing the velocity or increasing the radius helps.

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