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Old 21-10-2020, 02:09   #1
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Volvo saildrive , corrosion , views

This is a friends boat saildrive just lifted , the drive leg is original 2004 ( the pic resolutions should allow considerable zoom)

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The surface is quite rough and I canít decide if itís just bad layers of anti fouling , but looking around the yard, most saildrives seem much smother with little roughness

Is there a remedy , sand , repaint , or what , does it need expert examination

Thanks for help
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Old 21-10-2020, 04:44   #2
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Re: Volvo saildrive , corrosion , views

The images suggest inadequate anodes. If that's true, it's sand, leaving a slightly rough surface, prime, and paint, but protect the saildrive with zincs bonded to the boat's ground.
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Old 21-10-2020, 12:17   #3
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Re: Volvo saildrive , corrosion , views

it was checked today by a volvo penta mechanic, he stated is was fine , mostly just anti-foul buildup
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Old 21-10-2020, 22:10   #4
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Re: Volvo saildrive , corrosion , views

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Originally Posted by tkeithlu View Post
The images suggest inadequate anodes. If that's true, it's sand, leaving a slightly rough surface, prime, and paint, but protect the saildrive with zincs bonded to the boat's ground.
The zinc looks unphased. These drives are supposed to be ungrounded. Not supposed to use copper paint on them though.
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Old 29-10-2020, 09:59   #5
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Re: Volvo saildrive , corrosion , views

I've been wrong plenty of times, and may be now, but I'm still not ready to accept that there is nothing going on here. The surface of the casting looks pitted and the paint is eaten away. It looks like corrosion, but then, we cannot reach out and touch it.
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