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03-12-2014, 06:18
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#1
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Registered User
Join Date: May 2014
Location: USA
Boat: 41' yawl
Posts: 1,187
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Barnacles on my dinghy
I didn't use any antifouling on my dink this year and ended up with barnacles the size of walnuts.
They scraped off easily enough but leave some hard residue behind where they were attached. This is a hypalon dinghy. Any recommendations for how to remove that residue (in preparation for applying antifouling) ??
Thanks!!!
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03-12-2014, 06:47
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#2
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Moderator Emeritus
Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,351
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Re: Barnacles on my dinghy
Does muratic acid affect hypalon?
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03-12-2014, 06:49
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#3
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Senior Cruiser
Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 49,139
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Re: Barnacles on my dinghy
Quote:
Originally Posted by a64pilot
Does muratic acid affect hypalon?
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No.
You might try Vinegar or (very carefully) Muriatic Acid* on the calcium carbonate residue.
* Muriatic acid is hydrochloric acid at about a 25% concentration. Hydrochloric acid (up to 38%) does not attack plastics, such as
chlorosulfonated polyethylene (Hypalon).
GELLED hydrochloric acid at a 12 to 17 percent concentration for cleaning toilets might be safer.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"
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03-12-2014, 07:05
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#4
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cat herder, extreme blacksheep
Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 18,967
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Re: Barnacles on my dinghy
vinegar works well without chemical problems.
i used to scrape mine with a plastic scraper.
i found the hypalon dink antifouling paint was inadequate, so i saved dough and kept scraping and lifting dink out of water. good luck.
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03-12-2014, 07:17
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#5
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Registered User
Join Date: Sep 2010
Location: Land of Disenchantment
Boat: Bristol 47.7
Posts: 5,607
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Re: Barnacles on my dinghy
FWIW, I was advised by the Achilles dealer in Annapolis that it's also safe & effective to use acetone on hypalon. Always better to start with vinegar or something milder, but sometimes the stronger stuff is needed.
Bummer to hear that the anti-fouling that is marketed for dinghies doesn't work, as I only recently bought some! Oh well, might give it a try anyway . . . .
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03-12-2014, 07:31
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#6
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Senior Cruiser
Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 49,139
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Re: Barnacles on my dinghy
Quote:
Originally Posted by Exile
FWIW, I was advised by the Achilles dealer in Annapolis that it's also safe & effective to use acetone on hypalon . . . .
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I don’t believe Calcium Carbonate is soluble in Acetone.
Calcium Carbonate dissolves with effervescence in acetic acid, in hydrochloric acid, and in nitric acid.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"
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03-12-2014, 07:38
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#7
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Registered User
Join Date: Sep 2010
Location: Land of Disenchantment
Boat: Bristol 47.7
Posts: 5,607
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Re: Barnacles on my dinghy
Quote:
Originally Posted by GordMay
I don’t believe Calcium Carbonate is soluble in Acetone.
Calcium Carbonate dissolves with effervescence in acetic acid, in hydrochloric acid, and in nitric acid.
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I'm sure you're correct. Acetone is probably not the right choice for barnacles. Come to think of it, it was recommended to try and remove staining that looked like it was ingrained into the fabric. My mistake -- thanks for the info.
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03-12-2014, 07:50
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#8
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Registered User
Join Date: Mar 2007
Location: Rocky's Boat Yard
Boat: Tayana V42 - Passages
Posts: 611
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Re: Barnacles on my dinghy
I've used Pettit's dinghy paint on my RIB for several years with good results. Earlier this year I applied a Marpro (Bluewater) ablative with the same copper percentage as the Pettit and I had barnacles in two weeks. The barnacles did come off easily but the Pettit worked much better.
__________________
You can make more money but you can't make more time.
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03-12-2014, 07:57
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#9
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Hull Diver
Join Date: Oct 2006
Location: Under a boat, in a marina, in the San Francisco Bay
Posts: 5,428
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Re: Barnacles on my dinghy
Quote:
Originally Posted by Exile
Bummer to hear that the anti-fouling that is marketed for dinghies doesn't work, as I only recently bought some! Oh well, might give it a try anyway . . . .
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Fouling rates and organisms vary widely from region to region. An anti fouling paint that is a poor performer in Mexico may work very well in your neck of the woods.
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03-12-2014, 08:04
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#10
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cat herder, extreme blacksheep
Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 18,967
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Re: Barnacles on my dinghy
i used the specific use on hypalon dinghies antifouling paint in cali.
in cold water, it did not work.
was a lot easier to merely lift dink out of water daily
acetone is the chemical recommended by the creators of hypalon for cleaning before repairing. used before the 2 part glue specific fro hypalon dinghies, that creates a bond lasting many years.
vinegar is a lot cheaper and more easily obtained than is acetone in many places.
but, then, as i have only been aboard and used many products since 1990, i know absolutely nothing. rodlmffao
in mexico, most cruising folks do not use bottom paint on dinks as the dinks are lifted out of water and locked onto boat daily . no need for bottom paint.
funny how some presume the words written are about mexico, whereas many years were spent in cali waters prior to departure.
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03-12-2014, 08:09
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#11
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Registered User
Join Date: Sep 2010
Location: Land of Disenchantment
Boat: Bristol 47.7
Posts: 5,607
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Re: Barnacles on my dinghy
Quote:
Originally Posted by fstbttms
Fouling rates and organisms vary widely from region to region. An anti fouling paint that is a poor performer in Mexico may work very well in your neck of the woods.
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Thanks fstbttms, and you oughta know! I suppose your advice applies the same for dinghy bottoms as it does for the mother ship. I've had good success with Pettit Trinidad SR (or "Pro") on my boat based on the Chesapeake Bay over the years. My dinghy is a Hypalon inflatable, however, and not a RIB -- seems to be fewer choices out there for this application. Never used bottom paint on it before so the experiment begins . . . .
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03-12-2014, 08:17
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#12
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Registered User
Join Date: Sep 2010
Location: Land of Disenchantment
Boat: Bristol 47.7
Posts: 5,607
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Re: Barnacles on my dinghy
Quote:
Originally Posted by zeehag
i used the specific use on hypalon dinghies antifouling paint in cali.
in cold water, it did not work.
was a lot easier to merely lift dink out of water daily
acetone is the chemical recommended by the creators of hypalon for cleaning before repairing. used before the 2 part glue specific fro hypalon dinghies, that creates a bond lasting many years.
vinegar is a lot cheaper and more easily obtained than is acetone in many places.
but, then, as i have only been aboard and used many products since 1990, i know absolutely nothing. rodlmffao
in mexico, most cruising folks do not use bottom paint on dinks as the dinks are lifted out of water and locked onto boat daily . no need for bottom paint.
funny how some presume the words written are about mexico, whereas many years were spent in cali waters prior to departure.
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Good advice, Zee. I've always lifted my dink out too, but one time I forgot and it stayed in the water for about a week -- in Charleston in the summer! That was the beginning of the end for that aging dink. I recently acquired a new one, so thought I'd start off trying bottom paint on it for the first time. Probably can't hurt.
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03-12-2014, 08:33
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#13
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Registered User
Join Date: Jan 2014
Location: Miami Beach Fl
Boat: Colombia Cc 11.8
Posts: 1,758
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Re: Barnacles on my dinghy
Quote:
Originally Posted by GordMay
No.
You might try Vinegar or (very carefully) Muriatic Acid* on the calcium carbonate residue.
* Muriatic acid is hydrochloric acid at about a 25% concentration. Hydrochloric acid (up to 38%) does not attack plastics, such as
chlorosulfonated polyethylene (Hypalon).
GELLED hydrochloric acid at a 12 to 17 percent concentration for cleaning toilets might be safer.
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Thank you. I've been using muriatic acid for years and knew it was also called hydrochloric Acid but didn't know the distinction. It's great for removing calcium deposits of any type and to state the obvious: do not breathe the fumes
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03-12-2014, 09:11
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#14
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Registered User
Join Date: May 2012
Location: NH and Maine
Boat: 2000 Mainship 390
Posts: 46
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Re: Barnacles on my dinghy
i used the stuff from inflatableboatparts.com this year in NH and it was like peach fuzz after the season instead of like a vikings beard. i was happy with it
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03-12-2014, 11:11
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#15
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Registered User
Join Date: Sep 2014
Posts: 111
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Re: Barnacles on my dinghy
If you are concerned about muratic acid check the plastic container it is stored in. I have no proof but bottom paint seems to be worse for dinghy bottoms than acid.
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