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Propeller anti-fouling?
On Mon, 18 Jan 2010 16:28:05 +0100, "Edgar"
wrote: "Bruce In Bangkok" wrote in message .. Has anyone tried any of the anti-fouling schemes intended for propellers, and if so what was your experience? The question comes about because I just had to dive on my prop and clean it. When I got down there I discovered a mass of "clams" as big as a bushel basket. Took two days to scrape them all off. True, for one reason or another, the boat hasn't moved in the better part of a year but still I don't believe I have ever seen as much growth. Must be either global warming or high CO2 content :-) In any event, it does make one think "there must be a better way". Cheers, Bruce (bruceinbangkokatgmaildotcom) Ordinary ablative antifouling might be better than nothing if you hardly use the boat but it washes off in no time at all if you run the engine. I use some expensive stuff in a spray can that Volvo produce for their underwater units. This seems basically to be the same sort of antifouling but harder, so it does not wash off so quickly. Also it makes a somewhat slick surface so that barnacles find it harder to stay on while the prop is running. I have a theory, not yet put to the test, that the very slick paint that has been produced to make a wall graffiti-proof would be the way to go because barnacles could not stick to it at all once the prop started to rotate.. The reason I have not yet tested this idea is because the smallest quantity that I have found for sale is about 10 gallons. You are correct that normal anti-fouling paint doesn't stay on the prop however several paint companies are making a paint specifically for propellers. The recommended procedure is to (1) sandblast or grind the propeller to a specific surface finish; (2) clean the propeller chemically clean; (3) apply a specific primer and finally (4) apply a specific anti-fouling paint. The whole procedure is involved and the paint is expensive and apparently deviating from the specified procedure results in failure. Thus my questions. Cheers, Bruce (bruceinbangkokatgmaildotcom) |
#2
posted to rec.boats.cruising
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Propeller anti-fouling?
On Tue, 19 Jan 2010 07:32:32 +0700, Bruce In Bangkok
wrote: On Mon, 18 Jan 2010 16:28:05 +0100, "Edgar" wrote: "Bruce In Bangkok" wrote in message . . Has anyone tried any of the anti-fouling schemes intended for propellers, and if so what was your experience? The question comes about because I just had to dive on my prop and clean it. When I got down there I discovered a mass of "clams" as big as a bushel basket. Took two days to scrape them all off. True, for one reason or another, the boat hasn't moved in the better part of a year but still I don't believe I have ever seen as much growth. Must be either global warming or high CO2 content :-) In any event, it does make one think "there must be a better way". Cheers, Bruce (bruceinbangkokatgmaildotcom) Ordinary ablative antifouling might be better than nothing if you hardly use the boat but it washes off in no time at all if you run the engine. I use some expensive stuff in a spray can that Volvo produce for their underwater units. This seems basically to be the same sort of antifouling but harder, so it does not wash off so quickly. Also it makes a somewhat slick surface so that barnacles find it harder to stay on while the prop is running. I have a theory, not yet put to the test, that the very slick paint that has been produced to make a wall graffiti-proof would be the way to go because barnacles could not stick to it at all once the prop started to rotate.. The reason I have not yet tested this idea is because the smallest quantity that I have found for sale is about 10 gallons. You are correct that normal anti-fouling paint doesn't stay on the prop however several paint companies are making a paint specifically for propellers. The recommended procedure is to (1) sandblast or grind the propeller to a specific surface finish; (2) clean the propeller chemically clean; (3) apply a specific primer and finally (4) apply a specific anti-fouling paint. The whole procedure is involved and the paint is expensive and apparently deviating from the specified procedure results in failure. Thus my questions. Cheers, Bruce (bruceinbangkokatgmaildotcom) Normal anti-fouling should not be applied to a propeller. Normal anti-fouling paint contains copper and your prop will get eaten. |
#3
posted to rec.boats.cruising
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Propeller anti-fouling?
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#4
posted to rec.boats.cruising
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Propeller anti-fouling?
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