The removal of surface material by the action of numerous individual impacts of solid or liquid particles is a definition of:

The removal of surface material by the action of numerous individual impacts of solid or liquid particles is a definition of:

• A. Abrasion
• B. Erosion
• C. Erosion–corrosion
• D. Corrosion

Answer: (B)

Erosion is the removal of surface material by the action of numerous individual impacts of solid or liquid particles. In piping, this occurs when abrasive particles in a flow strike the interior surfaces at velocity, gradually dislodging material. Abrasion involves wear mainly from sliding or rubbing contact, not high-velocity impacts. Erosion–corrosion is a combined effect of mechanical wear and chemical attack, while corrosion alone is chemical dissolution without the primary role of particle impacts. The definition given matches erosion, hence it is the best choice.

Erosion is the removal of surface material by the action of numerous individual impacts of solid or liquid particles. In piping, this occurs when abrasive particles in a flow strike the interior surfaces at velocity, gradually dislodging material. Abrasion involves wear mainly from sliding or rubbing contact, not high-velocity impacts. Erosion–corrosion is a combined effect of mechanical wear and chemical attack, while corrosion alone is chemical dissolution without the primary role of particle impacts. The definition given matches erosion, hence it is the best choice.