The scanning electron microscopy (SEM) has been used to study the erosion-corrosion mechanisms of HVOF-sprayed WC-Cr-Ni and WC/CrC coatings after exposure to a concentrated impinging slurry. The surface morphology observations revealed that after the repeated and violent impingement of erodent particles, the coatings were first fractured and then the large and deep craters were formed on the surface, which resulted in the eventual removal of the coatings. The material loss on WC/CrC coating is significantly lower than on WC-Cr-Ni coating, confirming the finding that the erosion-corrosion resistance of coatings is strongly controlled by the composition of the coatings.
|Number of pages||4|
|Journal||Institute of Physics Conference Series|
|Publication status||Published - 2004|
|Event||Electron Microscopy and Analysis 2003 - Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference - Oxford, United Kingdom|
Duration: 3 Sep 2003 → 5 Sep 2003