Full definition
Synergistic degradation mechanism where mechanical erosion and chemical corrosion act simultaneously, producing 2–10× greater material loss than each acting alone. Common in slurry pumps, acid-pulp pipelines, valves and hydrocyclones in leaching and flotation plants. Corrosive damage removes the passive film, continuously exposing fresh metal to erosion. Control: bimetallic materials (high-chrome + rubber), vinyl ester or epoxy novolac coatings.