Originally Posted by
Turbine D
tdracer,
I also suspect the alloy being used for the turbine blades may be more prone to corrosion than perhaps other alloys required by other engine manufacturers. In other words, if the coating deteriorates, the bare alloy needs to provide a margin for a period of time in terms of strength and corrosion resistance.
I believe that you are quite correct in that the IPT Blade material has less corrosion resistance. Material selection is now so important that there are a number of limitations and final section is validated during development testing. It is probable that the level of sulphidation experienced by certain operators was not seen in development. I understand there is a solution which takes time to introduce in service. RR will be monitoring the safety situation extremely closely as part of their safety processes.