Erosion corrosion

Erosion corrosion is a degradation of material surface due to mechanical action, often by impinging liquid, abrasion by a slurry, particles suspended in fast flowing liquid or gas, bubles or droplets, cavitation, etc. The mechanism can be described as follows:

• mechanical erosion of the material, or protective (or passive) oxide layer on its surface,
• enhanced corrosion of the material, if the corrosion rate of the material depends on the thickness of the oxide layer.

Additional recommended knowledge

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Essential Laboratory Skills Guide

The mechanism of erosion corrosion, the materials affected by it, and the conditions when it occurs are generally different than that of flow-accelerated corrosion, although the last one is sometimes classified as a sub-type of erosion corrosion.

Surface chemistry can play a role in erosion corrosion due to mechanochemical effects.

See also

• Flow-accelerated corrosion
• Tribology

Further reading

• Alan Levy, "Solid Particle Erosion and Erosion-Corrosion of Materials", ASM International, 1995.