Cavitation

[jfm]

location of pitting

Hmmm. I have heard cavitation can get the hub, though it's not obvious (to me) why.

Is it definitely the case that there's no pitting at all on the aft-facing surface of the prop? If there's none there, it could be cavitation, but if there's any there it must be electrolysis

 

[stewart]

Kim, JFM...

.... thanks all that was very useful and educational.

 

[ccscott49]

Re: Good thought Kim....

That sounds like corrosin, cavitation damage shows mainly on the blades, where the pressure is lowest and the water "boils" then condenses.