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Cavitation Erosion Damage Characteristics of Electroless Nickel Plated Gray Cast Iron

Cavitation erosion damage behaviors in the coolant of electroless nickel plated diesel engine cylinder liners were investigated. In the case of electroless nickel coating, pitting damage was locally induced by cavitation erosion attacks. The pitting damage was promoted as galvanic corrosion accompanied it. Continued cavitation erosion attacks led to the plastic deformation, fatigue, and failure of electroless nickel coating. Consequently, local pitting damage to electroless nickel coating showed a tendency to progress in the depth direction so that the surface damage depth developed greatly.