Reply
 
Thread Tools Display Modes
 
Old 12-06-2013, 07:53 AM   #21
Senior Member
 
Parmenter's Avatar
 
City: Brisbane
Country: Australia
Vessel Model: 49ft 11inch catamaran-trawler
Join Date: Oct 2013
Posts: 204
Quote:
Originally Posted by fstbttms View Post
A waste of paint. Won't stay on long enough to make it worthwhile.
The whole bottom of the boat is made of epoxy coated in epoxy paint and that stays there.
__________________
Advertisement

Parmenter is offline   Reply With Quote
Old 12-06-2013, 07:55 AM   #22
Senior Member
 
Parmenter's Avatar
 
City: Brisbane
Country: Australia
Vessel Model: 49ft 11inch catamaran-trawler
Join Date: Oct 2013
Posts: 204
Quote:
Originally Posted by psneeld View Post
OK...so my "bronze" prop is manganese bronze (lot's of zinc in it)....the zinc is what galvanic action attacks first...so again...I wonder what the issue would be of trying to epoxy copper foil to a propeller blade?

Just like copper painting a prop only this would probably have more insulation with a thin coat of epoxy between them. The copper should wear better and longer than paint.

Sheathing hulls in copper is an "old time" method for wood hulls...so I wonder how a relatively slow turning trawler prop would handle it?
Which is exactly what copper loaded epoxy does.

Each year when you lightly sand the surface you have basically, fresh copper foil
__________________

Parmenter is offline   Reply With Quote
Old 12-06-2013, 10:35 AM   #23
Guru
 
psneeld's Avatar
 
City: Avalon, NJ
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 15,920
Quote:
Originally Posted by Parmenter View Post
Which is exactly what copper loaded epoxy does.

Each year when you lightly sand the surface you have basically, fresh copper foil
If it works so well...why doesn't everyone use it including those where budget is not a consideration????...

In all the years copper coat has been out...I have not seen one vessel done with it...nor talked to one person who has actually used it or even knew someone that did.

While in naval engineering for the USCG...the big push for new bottom coatings was on ...and NO ONE ever discussed copper coat...

so I have to ask ...if so great...why the world's greatest secret?
psneeld is online now   Reply With Quote
Old 12-06-2013, 12:09 PM   #24
Senior Member
 
fstbttms's Avatar
 
City: Under a boat, in a marina in the San Francisco Bay
Country: USA
Join Date: Mar 2012
Posts: 447
Quote:
Originally Posted by psneeld View Post
In all the years copper coat has been out...I have not seen one vessel done with it...nor talked to one person who has actually used it or even knew someone that did.
Oh, I've seen it plenty. And I wouldn't wish it on my worst enemy. It may work someplace, but that place ain't here.
__________________
Clean bottoms are FastBottoms!
fstbttms is offline   Reply With Quote
Old 12-06-2013, 12:20 PM   #25
Guru
 
HopCar's Avatar


 
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 3,506
I tried a copper loaded epoxy many years ago. It may have been Copper Coat, I don't remember. It wasn't worth the time or effort. Really cheap bottom paint would have worked just as well. I figured when I tried it, that if it wasn't good at keeping growth off, at least it should prevent blisters. It didn't do that either. It was a complete waste of time and money.

I've tried a lot of different coatings on my propeller. The only one I'll use now is Prop Speed. It will keep my propeller clean for a year or more. It also seems to be good for a few RPM and half a knot over a clean uncoated or painted propeller.
HopCar is offline   Reply With Quote
Old 12-06-2013, 03:43 PM   #26
Senior Member
 
Parmenter's Avatar
 
City: Brisbane
Country: Australia
Vessel Model: 49ft 11inch catamaran-trawler
Join Date: Oct 2013
Posts: 204
Quote:
Originally Posted by fstbttms View Post
Oh, I've seen it plenty. And I wouldn't wish it on my worst enemy. It may work someplace, but that place ain't here.
I wont use it because of the weight and cost of it but I also know plenty that have used it.
Parmenter is offline   Reply With Quote
Old 12-06-2013, 03:45 PM   #27
Senior Member
 
Parmenter's Avatar
 
City: Brisbane
Country: Australia
Vessel Model: 49ft 11inch catamaran-trawler
Join Date: Oct 2013
Posts: 204
Quote:
Originally Posted by psneeld View Post
If it works so well...why doesn't everyone use it including those where budget is not a consideration????...

In all the years copper coat has been out...I have not seen one vessel done with it...nor talked to one person who has actually used it or even knew someone that did.

While in naval engineering for the USCG...the big push for new bottom coatings was on ...and NO ONE ever discussed copper coat...
A bit like sticking copper foil on with epoxy?
Parmenter is offline   Reply With Quote
Old 12-06-2013, 03:46 PM   #28
Senior Member
 
Parmenter's Avatar
 
City: Brisbane
Country: Australia
Vessel Model: 49ft 11inch catamaran-trawler
Join Date: Oct 2013
Posts: 204
Quote:
Originally Posted by HopCar View Post
The only one I'll use now is Prop Speed.
Thats what I have been hearing down here as well
Parmenter is offline   Reply With Quote
Old 12-06-2013, 04:26 PM   #29
Guru
 
psneeld's Avatar
 
City: Avalon, NJ
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 15,920
Quote:
Originally Posted by Parmenter View Post
A bit like sticking copper foil on with epoxy?
wonder who has tried it? and or why not....
psneeld is online now   Reply With Quote
Old 12-06-2013, 05:06 PM   #30
Guru
 
Northern Spy's Avatar
 
City: Powell River, BC
Country: Canada
Vessel Name: Northern Spy
Vessel Model: Nordic Tug 26
Join Date: Feb 2012
Posts: 2,670
Quote:
Originally Posted by psneeld View Post

wonder who has tried it? and or why not....
Mass unbalance vibration comes to mind.
Northern Spy is online now   Reply With Quote
Old 12-06-2013, 08:41 PM   #31
QB
Senior Member
 
QB's Avatar
 
City: San Diego and Gabriola
Country: USA and Canada
Vessel Name: Skookum Maru
Vessel Model: Ed Monk design #1924
Join Date: Dec 2011
Posts: 215
Before:


After:


With this:


We'll see how it works.
QB is offline   Reply With Quote
Old 12-06-2013, 09:46 PM   #32
Guru
 
Northern Spy's Avatar
 
City: Powell River, BC
Country: Canada
Vessel Name: Northern Spy
Vessel Model: Nordic Tug 26
Join Date: Feb 2012
Posts: 2,670
Anyone know what the difference between cold galvanizing spray (zinc) and Barnacle Blocker or Barnacle Barrier is? I figure about $25 after I compared MSDS's, but I'm not really sure...
Northern Spy is online now   Reply With Quote
Old 12-06-2013, 10:06 PM   #33
Guru
 
psneeld's Avatar
 
City: Avalon, NJ
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 15,920
I think you are correct...tried Petit this time..if it works..will try just plain cold galvanizing in the spring...
psneeld is online now   Reply With Quote
Old 12-06-2013, 10:31 PM   #34
Guru
 
Northern Spy's Avatar
 
City: Powell River, BC
Country: Canada
Vessel Name: Northern Spy
Vessel Model: Nordic Tug 26
Join Date: Feb 2012
Posts: 2,670
I used Rust Oleum cold galvanizing spray last time I launched. But quite honestly, previous experience would dictate that it would only have to block a single barnacle (well, OK, maybe 2 or 3) to be a success where I boat. My bottom or prop just doesn't get that fouled.
Northern Spy is online now   Reply With Quote
Old 05-02-2014, 12:28 PM   #35
QB
Senior Member
 
QB's Avatar
 
City: San Diego and Gabriola
Country: USA and Canada
Vessel Name: Skookum Maru
Vessel Model: Ed Monk design #1924
Join Date: Dec 2011
Posts: 215
Quote:
Originally Posted by QB View Post

We'll see how it works.
To follow up, the answer is: not very well. After 4 months in the water and about 30 hours of running:



I don't know what the yard did for prep, but adhesion is poor. We're taking it back down to bronze.
QB is offline   Reply With Quote
Old 05-02-2014, 02:25 PM   #36
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 13,717
We're there barnacles on all those spots?
__________________
Eric

North Western Washington State USA
Nomad Willy is online now   Reply With Quote
Old 05-02-2014, 03:11 PM   #37
QB
Senior Member
 
QB's Avatar
 
City: San Diego and Gabriola
Country: USA and Canada
Vessel Name: Skookum Maru
Vessel Model: Ed Monk design #1924
Join Date: Dec 2011
Posts: 215
Quote:
Originally Posted by manyboats View Post
We're there barnacles on all those spots?
No, seemed to be all just paint blistering.
QB is offline   Reply With Quote
Old 05-09-2014, 06:15 PM   #38
Guru
 
JDCAVE's Avatar
 
City: Lions Bay, BC
Country: Canada
Vessel Name: Phoenix Hunter
Vessel Model: Kadey Krogen 42 (1985)
Join Date: Apr 2011
Posts: 1,612
I put zinc diaper cream on mine. :-).

Jim
JDCAVE is offline   Reply With Quote
Old 05-09-2014, 06:18 PM   #39
Guru
 
boatpoker's Avatar
 
City: Port Credit
Country: Ontario
Vessel Name: DIRT FREE
Vessel Model: Benford Fantail 38
Join Date: Sep 2012
Posts: 2,012
Quote:
Originally Posted by JDCAVE View Post
I put zinc diaper cream on mine. :-).

Jim

On your what ?
__________________
If you can live with the consequences, go for it - wg
Y'am what I y'am an' thats' all that y'am - Popeye
As God is my witness, I thought turkey's could fly. Mr.C
boatpoker is offline   Reply With Quote
Old 05-09-2014, 06:56 PM   #40
Guru
 
JDCAVE's Avatar
 
City: Lions Bay, BC
Country: Canada
Vessel Name: Phoenix Hunter
Vessel Model: Kadey Krogen 42 (1985)
Join Date: Apr 2011
Posts: 1,612
Copper plated props?

...prop! Seriously. I did that. My shipwright suggested it. I have since noticed a lot of commercial fishermen do that in my marina. It's also mentioned on several forums.

http://www.practical-sailor.com/blog/-10907-1.html

Jim
__________________

JDCAVE is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 05:47 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012