| abstract |
The present invention relates to protective and abradable coating compositions applied to rolls, and more particularly to conveyor rolls including abradable coatings for use in high temperature applications, methods for making such rolls, and its use. Corrosion caused by the aluminum melt is reduced and deposits are removed by friction. Thereby increasing the service life of the roller. The coating comprises 83-98 wt% aggregates comprising Si3N4, SiC or SiAlON particles or mixtures thereof, and 2-17 wt % Al2O3 , SiO2 , ZrO 2 , CeO 2 , Y 2 O 3 submicron particles or mixtures thereof. |