Observation of a threshold impact energy required to cause passive film rupture during slurry erosion of stainless steel |
| |
| Authors: | K Sasaki GT Burstein |
| |
| Institution: | Department of Materials Science and Metallurgy , University of Cambridge , Pembroke Street, Cambridge, CB2 3QZ, England |
| |
| Abstract: | The impact of solid particles during the erosion of stainless steel by a slurry jet reveals a sequence of anodic current transients due to individual impacts. Measurement of these current transients shows that there is a minimum particle energy below which no transients can be detected. The result is interpreted as a threshold energy required to rupture the passivating oxide film on the metal surface. If this energy is exceeded, the current transients arise from electrochemical reaction of the depassivated metal surface after denudation. Below this threshold no rupture occurs and there are no current transients. |
| |
| Keywords: | |
|
|
