The cavitation erosion (CE) and corrosion behaviors of cast and forged Nickel-aluminum bronzes were studied in deionized water and artificial seawater. Surprisingly, their CE mass losses in seawater were obviously less. Similar to forging process, cavitation load could cause alpha phase to transform into beta phase and dislocation to form in subsurface, which were beneficial to improve mechanical properties. beta and kappa phases were more easily to be dissolved in corrosion tests. However, cavitation heat changed corrosion mechanism and induced formation of a dense oxide film on surface, which could protect materials covered under it and reduce CE damage.