A study of the erosion-corrosion of PVD CrN/NbN superlattice coatings in aqueous slurries

The results indicated that the performance of the coating depended on the impact angle and the applied potential. The overall erosion-corrosion resistance of the coated samples was found to be superior to that of the uncoated samples; however, the relative protection depended on the impact angle and the applied potential. Possible reasons for such behaviour are described in this paper.