IPS Corrosion

[PCUK]

Stainless steel being one of the few metals that can set up it's own galvanic cell isn't an ideal material for outdrives.

 

[oldgit]

So what happened to the new fangled composite materials that Vilvo was supposed to be using in their outdrives.?

 

[Jonmendez]

Hi Jim what boat are they on?

 

[[2068]]

Available on petrol engines in the USA as the "ocean series", but not able to handle the same sort of torque as an aluminium DP-H, hence less useful for diesels, so we get the normal dissolving in salt water type.

dv.

 

[oldgit]

the normal dissolving in salt water type. /forums/images/graemlins/grin.gif

 

[[2068]]

It's a love hate thing. I love the way they drive, the speed, the economy. I just need reminding of that when I'm standing in a freezing puddle in February with antifouled hair.

dv.

 

[jimg]

Is this a Rodman by any chance? I have heard of another boat just hauled out and the same problem. Rumour has it that is not the first Rodman with these IPS problems.

 

[burgundyben]

this not partly caused by cavitation?

 

[DAKA]

Surly cavitation would not damage the hub especially the inside leading edge (photo 2)

 

[burgundyben]

I really dont know, certainly it looks like there is a corrosion problem, but I wonder if party a cavitation problem too, I think there is maybe still a bit to learn about IPS, I think lots more to it than modifying a outdrive and moving it...how in depth has the research been into the water flow etc I wonder.