Compression post steel base corrosion

[Liberty Risk]

I recently had a survey done on a 82' Dufour 4800 and nothing was mentioned about the compression post base but from the some pictures I took I noticed some corrosion on the steel beam. Anyone suggest a course of action on this metal beam? Not sure if it's even an issue. Thank you!

[Fore and Aft]

I think I would be dropping the mast and getting that steel sand blasted and painted.......that’s if it is salvageable? What worry’s me is what you cannot see?
Cheers

[DeepFrz]

Yep, its an issue.

[boatpoker]

Yes, that is a significant issue. Your surveyor is an idiot. That is just too obvious to miss .

Take a look at Marine Survey 101 and scroll about 20 percent of the way down to a similar photo where I could peel chunks of the beam away by hand.

Marine Survey 101, pre-survey inspection

[grantmc]

Come on OP you didn't really need to ask did you? That's not just corrosion that's rotted out. Looks like someone has done some work on it too. The compression post fixing looks new and it's just been bolted on to the old beam. Yuk. It shouldn't be an especially big job though. Presumably mast will need to come down, but perhaps possible to just jack up for access. You wouldn't want to be crossing oceans with it like that. But as always difficult to tell from a single photo taken on an unknown boat.

It's always interesting what you see on CF. I have a badly rusted beam too. It's been a slight concern to me since I bought the boat, and rust never sleeps as we know. But at least my surveyor picked it up and we had a discussion as to what's involved in repair. That's a classic place for rust.

[Ken Z]

I see a large problem. It is hard to see the details, but a little corriosion can be a lot. Is there dissimilar metals? alum.or ss to iron? I would replace. a welded alum. base would be similar metals and slow electrolysis probably$400-$600.Is there a week hole at the base of the mast. your surveyor did a poor job.

[Cheechako]

Looks pretty bad, is it removable? Build another one, from better material.

[Dougtiff]

Replace it with " G 10 ", just completed a similar job, and at the same time increase the load bearing surface if possible.

[DefinitelyMe]

Yes, it's a problem but not the end of the world. Mine was too far gone. I cut what was left out and did layers of glass and high-density filler to build it up again. Mast was jacked up with two car jacks. Took a while but wasn't hard or expensive. Yours might be ok though, in which case just prep and paint.

Is that an aluminium plate bolted with stainless bolts to a mild steel base? Argh.