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trontek
#1 Posted : Wednesday, April 15, 2009 6:59:15 AM(UTC)
trontek

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Is there such a thing as fresh water barnicales(sp?), or is this galvanic corosion?

Thanks,

Jim
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GB49
#2 Posted : Wednesday, April 15, 2009 8:03:18 AM(UTC)
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I'm betting you have a problem there.

I hope your not using or have used copper based paint?

Docked near someone w/ electrical prob or shore power leak.

I think the anodes should take that abuse, not the hull.

-Karl
1986, 32' Sedan, twin 360ci, 275hp Chrysler's w/ K&N flame arrestors
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Jazman
#3 Posted : Wednesday, April 15, 2009 8:32:22 AM(UTC)
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Thats just what my bottom looked like. Scratch them with something...If they are HARD and crusty then they are probably barnacles, but if they are powdery and chalky they are probably corrosion like mine. My bottom has 2 different issues...some of the corrrosion is between paint layers leading me to believe it was a reaction to different types of paint hat was used and some was of it was all the way down to the aluminum through all layers of paint. I am getting my bottom blasted in the very near future and then I am going to do the barrier coat routine. I wont be able to tell how much damage may have been done till its blasted. I let ya all know.
Bill

1975 37' FB Sedan
Sleepless Knights
Bohemia River
Chesapeake City, MD
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jralbert
#4 Posted : Wednesday, April 15, 2009 10:10:45 AM(UTC)
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If it's corrosion, find out what's causing it first or your expensive new paint job won't be worth the cost. Get a paint sample and send it to a leading mfr like the Interlux people or similar. That will tell if the PO used copper based anti-fouling. (to the engineers on board: couldn't you burn the paint and if it glows a certain color (blue/green) wouldn't that indicate copper?)

BTW, what part of the boat is that? And, if you could take a sharp extreme closeup it might help in answering your question. Barnacles have a certain relatively consistent shape.
Joel Albert, Potomac MD
"Charlie B" - 1988 32' FBS
Twin 318's/FWC/16x15 nibral props
docked Deale, MD
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dougrose
#6 Posted : Thursday, April 16, 2009 12:32:34 AM(UTC)
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The flame test will show the presence of copper (ions) in the flame, but will not show what compound it was part of in the paint.

Trilux 33 contains copper, but not in the same compound as in regular copper bottom paint.


1975 32' Flybridge Sedan, twin Perkins 6-354 diesels, 1:1.53 velvetdrives, 16 X 19 props. Merritt Island, Florida
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trontek
#5 Posted : Thursday, April 16, 2009 9:34:39 AM(UTC)
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jralbert wrote:
BTW, what part of the boat is that? And, if you could take a sharp extreme closeup it might help in answering your question. Barnacles have a certain relatively consistent shape.


The entire bottom looks the same. The area in the pic is the port side area around the head output(disabled). I'll try for a closeup soon.
Jim

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dougrose
#7 Posted : Thursday, April 16, 2009 9:45:07 AM(UTC)
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OK, you want to see barnacles. Here are barnacles. I took this at my last haulout a couple of weeks ago. The boat had been in the water largely unused for over a year.



This is what she looked like going in:




1975 32' Flybridge Sedan, twin Perkins 6-354 diesels, 1:1.53 velvetdrives, 16 X 19 props. Merritt Island, Florida
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Roger2
#8 Posted : Thursday, April 16, 2009 12:39:22 PM(UTC)
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Doug,
We splashed today, I'm sure glad I'm in fresh water! Washed algae off with plain old dish soap! Cleaned & waxed
lower part of hull, still have decks to do.

How do you get barnacles off?

Roger
Sea Jay
1983 37 double cabin, twin 230hp Volvo diesels, twin disk 1.5-1 20X 23 4 blade props
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tr_guy79
#9 Posted : Thursday, April 16, 2009 1:58:26 PM(UTC)
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scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and, drink a beer, scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and, take a leak, and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and , drink another beer, scrape and scrape and scrape and scrape and take a leak, and scrape and scrape and scrape and drink another beer, and scrape and scrape and take a leak, and drink another beer, and scrape and scrape and, and drink another beer, and take a leak, and scrape, and drink another beer, and another beer, and another beer.

Repeat as needed.
"McKenna Renee"
1972 '32 FB Express. Twin 318 / Edelbrock 1409s
Chesapeake City Md (Upper Bay / C&D Canal)
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dougrose
#11 Posted : Thursday, April 16, 2009 3:05:17 PM(UTC)
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The marina has a 5000 psi pressure washer with a turbine thing at the end that swirls the spray. It will take off fresh barnacles pretty well:



There is also a lot of scraping, for the ones that don't wash off and for the ones that are hidden under the straps:



The marina did a pretty good job, all the big stuff was off and I only needed a day to finish up the removal. In a few places the old paint was off down to the zinc chromate, so I spot primed that with Interlux 2000, and then two coats of Trilux 33 with Biolux that did its job for the first six months or so.

This is how it is in Florida, ask Sorry Dog, he knows.


1975 32' Flybridge Sedan, twin Perkins 6-354 diesels, 1:1.53 velvetdrives, 16 X 19 props. Merritt Island, Florida
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Docsnow
#12 Posted : Thursday, April 16, 2009 10:47:24 PM(UTC)
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Good Grief Doug, how much does that cut down on your gph Think How does that effect props as for pitch & vibration I’m pretty sure they don’t gather evenly Eh? Hey us Great Lakes guys haven’t thing to B-tch about with the little bit of slim & grass that gathers on the bottons of our boats albeit we are only in the water 6 to 7 months a season. Not talking I for get the chemical name of old A/F paint that E P A banned but was the barnacle growth any lesser? Anxious
Here’s a few pix for comparison, as to salt water boats to fresh water ones Whistle the last pic is after power wash

Norm,
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 You'll have bad times, but they'll just wake you up to the good times you weren't paying attention to

Some people try to turn back their odometers.Not me, I want people to know "why" I look this way.I've traveled a long way and some of the roads weren't paved.
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ComputerJoe
#13 Posted : Friday, April 17, 2009 12:23:34 AM(UTC)
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Geez, our southern, salty, cousins must spend 1/2 of the 5 months we spend not boating scraping their bottoms off. No bitching today, we are forecast to hit 70 I said 70 degrees. Need to get the speedo's out.
:d/

Hey Norm, I see the chips, where's the bud!
That brown paper bag should be full of that life sustaining fluid, but it dosen't look like it.
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pfhlaw
#15 Posted : Friday, April 17, 2009 1:11:51 AM(UTC)
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My guess is that the brown paper bag is full of Norm's empties,.............from that morning.
Peter
1981 32' sedan bridge
twin Chrysler 360 cu. in. 250 hp engines
Raw water cooled
Nimbus II
Home port: New Buffalo, MI
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fastjeff
#17 Posted : Friday, April 17, 2009 1:29:45 AM(UTC)
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Just for the record, if your props have a coating of barnacles, you will NOT be able to plane off. Guess how I found that out!

Jeff
"...reality is not nearly as lovely as the world of Liberal Land. No wonder so many people want to go there." - Tom Sowell
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dougrose
#18 Posted : Friday, April 17, 2009 1:52:16 AM(UTC)
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Jeff is quite right. I made the 18 mile trip to Titusville at around 6 knots, with both engines turning at 1800 rpm. I just pretended I wasn't in a hurry. Burned 14 gallons of diesel, tho.

I had a diver scheduled to come and clean the props and rudders. With even the drive surfaces of the props clean, I couldn't plane off but would probably get 12 knots out of the same amount of power. When he didn't show, I left. Once I would have gone down and hit the running gear myself, but no longer...

Came back in under an hour and burned a little less. Not sure on fuel amounts, since the gauges are purely advisory. I stick the tanks to estimate fuel remaining.


1975 32' Flybridge Sedan, twin Perkins 6-354 diesels, 1:1.53 velvetdrives, 16 X 19 props. Merritt Island, Florida
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jralbert
#19 Posted : Friday, April 17, 2009 2:50:31 AM(UTC)
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At mid-season in the Ches. Bay, before hull cleaning, my 19 mph goes down to 13 mph at same throttle setting, about 2900 rpm. And the barnacles are much less intense than what Doug sufferred in the warm salt water of FL.
Joel Albert, Potomac MD
"Charlie B" - 1988 32' FBS
Twin 318's/FWC/16x15 nibral props
docked Deale, MD
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DiverDennis
#10 Posted : Friday, April 17, 2009 3:43:15 AM(UTC)
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tr_guy79 wrote:
scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and, drink a beer, scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and, take a leak, and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and scrape and , drink another beer, scrape and scrape and scrape and scrape and take a leak, and scrape and scrape and scrape and drink another beer, and scrape and scrape and take a leak, and drink another beer, and scrape and scrape and, and drink another beer, and take a leak, and scrape, and drink another beer, and another beer, and another beer. Repeat as needed.


LOL!
Surface Interval
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dougrose
#20 Posted : Friday, April 17, 2009 8:14:09 AM(UTC)
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Actually, what tr_guy79 wrote is not really accurate. He left out some of the scraping.


1975 32' Flybridge Sedan, twin Perkins 6-354 diesels, 1:1.53 velvetdrives, 16 X 19 props. Merritt Island, Florida
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tr_guy79
#22 Posted : Friday, April 17, 2009 8:53:20 AM(UTC)
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Well, that's just how far I have gotten. I still have about 10 foot left on the stbd side (ran out of beer)
"McKenna Renee"
1972 '32 FB Express. Twin 318 / Edelbrock 1409s
Chesapeake City Md (Upper Bay / C&D Canal)
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Docsnow
#21 Posted : Friday, April 17, 2009 10:54:27 PM(UTC)
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dougrose wrote:
Actually, what tr_guy79 wrote is not really accurate. He left out some of the scraping.


Doug,

Shane, made one other serious mistake d'oh! “by not having the proper tool to do such a dastardly chore” he didn’t have enough Brewski’s to complete the Job Shame on you or as it has happened the me having to meany Brewski’s & saying I’ll get the rest tomorrow, but some WHO it seems tomorrow never comes. Whistle

Norm,
BigBigMs Live On Applause
http://www.picturetrail.com/gid23690601 Try it now there's music to listen to while U view the Big M's

http://www.PictureTrail..../index.php?clubID=20726 this one for the Pix club


 You'll have bad times, but they'll just wake you up to the good times you weren't paying attention to

Some people try to turn back their odometers.Not me, I want people to know "why" I look this way.I've traveled a long way and some of the roads weren't paved.
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