Corrosion-erosion wear behaviors of 13Cr24Mn0.44N stainless steel in saline-sand slurry

The corrosion-erosion wear behaviors of austenitic stainless steels, 316L and 13Cr24Mn0.44N, were investigated in water-sand slurry and saline-sand slurry, respectively. The corrosion-erosion wear mass-loss was measured to evaluate the influence of medium and materials. The worn surface and corrosion-erosion wear mechanism were analyzed using a scanning electron microscopy and a non-contact optical profilometer. Results show that the corrosion-erosion wear mass-loss of 13Cr24Mn0.44N is lower than that of 316L in both the slurries. The relative wear resistance increases with the increasing of the impingement velocity and arrives at maximum of 1.6. The dominant wear mechanism of 13Cr24Mn0.44N is abrasive wear in the water-sand slurry, whereas it becomes abrasive wear associated with little corrosive pitting in the saline-sand slurry. As the impingement velocity increased all the synergism ratios exhibit a tendency of increase, among which the synergism ratio of 13Cr24Mn0.44N is always lower than that of 316L at any given velocity. The results indicate that 13Cr24Mn0.44N possesses a predominant anti-corrosion-erosion wear property. (C) 2009 Elsevier Ltd. All rights reserved.