Using Bottom Paint on Brass Propeller - SailNet Community
 12Likes
Reply
 
LinkBack Thread Tools
post #1 of 36 Old 04-23-2013 Thread Starter
Member
 
Join Date: Dec 2012
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Using Bottom Paint on Brass Propeller

Just polished up my brass propeller after 15 years of using ablative bottom paint on it. It polished up real nice, no corrosion damage. I was told I should use some fancy stuff ranging in price. It seemed like a lot of money, I had to understand what it was going to do for me. Found an old post on here which had some good alternatives (link below). Not giving up yet, I looked up galvanic reaction of various metals (second link below). A difference of hundreds of mill volts is likely to result in galvanic corrosion, but only a few tens of mill volts is unlikely to be a problem. Note that the numbers at the top are in Volts. The chart shows copper and brass in the same range. Plumbers have been mixing brass and copper for over 100 years with no problems. The paint I've been using is the cheapest I can find, it has Copper and Cuprous Oxide (principal oxides of copper), which I believe to be very common ingredients for bottom paint. I am not a scientist but it seems that this is just a bunch of nonsense with the brass props.

Interested in knowing what you guys think, or maybe shed some more light on the subject.

Brass Prop Anti-Fouling Coatings ?

Galvanic Corrosion Chart*

Last edited by 73Morgan; 04-23-2013 at 11:18 AM.
73Morgan is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 36 Old 04-23-2013
Just another Moderator
 
Faster's Avatar
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 16,534
Thanks: 104
Thanked 310 Times in 300 Posts
Rep Power: 10
     
Re: Using Bottom Paint on Brass Propeller

The prop will be bronze, not brass....

Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Faster is offline  
Quote Quick Reply Share with Facebook
post #3 of 36 Old 04-23-2013
Wish I never found SN!
 
SimonV's Avatar
 
Join Date: Jul 2006
Location: Brisbane Australia
Posts: 2,062
Thanks: 8
Thanked 4 Times in 4 Posts
Rep Power: 10
 
Re: Using Bottom Paint on Brass Propeller

If its brass its too late.

Simon
Ericson 39B.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

I love my boat
S/V GOODONYA
Brisbane
present location Heading to the Whitsundays

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

DELIVERY SKIPPER
Drinking Rum before 10am makes you a Pirate NOT an alcohlic
SimonV is offline  
Quote Quick Reply Share with Facebook
post #4 of 36 Old 04-23-2013
Aspiring to be a Mexican
 
sww914's Avatar
 
Join Date: Oct 2008
Location: La Cruz de Hunacaxtle, Mexico
Posts: 542
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 7
 
Re: Using Bottom Paint on Brass Propeller

Slightly off topic, but my friends were stuck in one spot at anchor for 3 months with a dead engine. She put pieces of nylon stockings on the blades to protect them. After all that time, the nylon slid right off covered in barnacles and slime and cleaning the prop was a 30 second job.
radly53 and 73Morgan like this.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
sww914 is offline  
Quote Quick Reply Share with Facebook
post #5 of 36 Old 04-23-2013 Thread Starter
Member
 
Join Date: Dec 2012
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Using Bottom Paint on Brass Propeller

Quote:
Originally Posted by Faster View Post
The prop will be bronze, not brass....
Color is brassy, I thought bronze has a bronze hue. Are all props bronze?
73Morgan is offline  
Quote Quick Reply Share with Facebook
post #6 of 36 Old 04-23-2013 Thread Starter
Member
 
Join Date: Dec 2012
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Using Bottom Paint on Brass Propeller

Quote:
Originally Posted by SimonV View Post
If its brass its too late.
Why is it to late?
73Morgan is offline  
Quote Quick Reply Share with Facebook
post #7 of 36 Old 04-23-2013
Just another Moderator
 
Faster's Avatar
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 16,534
Thanks: 104
Thanked 310 Times in 300 Posts
Rep Power: 10
     
Re: Using Bottom Paint on Brass Propeller

Quote:
Originally Posted by 73Morgan View Post
Color is brassy, I thought bronze has a bronze hue. Are all props bronze?

Not all props are bronze, but I'm pretty sure there are no brass props.

SS, Aluminum, Plastic etc... but not brass.
73Morgan likes this.

Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Faster is offline  
Quote Quick Reply Share with Facebook
post #8 of 36 Old 04-23-2013
DrB
Senior Member
 
Join Date: Mar 2007
Location: New England
Posts: 966
Thanks: 0
Thanked 7 Times in 7 Posts
Rep Power: 9
 
Re: Using Bottom Paint on Brass Propeller

Quote:
Originally Posted by sww914 View Post
Slightly off topic, but my friends were stuck in one spot at anchor for 3 months with a dead engine. She put pieces of nylon stockings on the blades to protect them. After all that time, the nylon slid right off covered in barnacles and slime and cleaning the prop was a 30 second job.
Clever idea.

If you liked my advice/response, give me some rep points. If you didn't......well what do you expect, it was free.
DrB is offline  
Quote Quick Reply Share with Facebook
post #9 of 36 Old 04-23-2013 Thread Starter
Member
 
Join Date: Dec 2012
Posts: 45
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Using Bottom Paint on Brass Propeller

Faster, Thanks

I appreciate the correction it's a bronze prop. If I am reading the chart correctly copper is on the Anodic side of the two bronzes shown. Copper would then be the sacrificial metal to the bronze. So, it still makes sense to me that there is no problem with using bottom paint with copper in it on bronze props.
73Morgan is offline  
Quote Quick Reply Share with Facebook
post #10 of 36 Old 04-23-2013
Senior Member
 
tommays's Avatar
 
Join Date: Sep 2008
Posts: 4,296
Thanks: 1
Thanked 30 Times in 30 Posts
Rep Power: 7
 
Re: Using Bottom Paint on Brass Propeller

WELL

There is bottom paint that is made for underwater metal


Not everything happens to things 100% of the time they are just general recommendations of what is considered good and bad practice

I can snap a picture next time I am inside a SS vessel from the 1970s were the SS blade locking pins got in a fight with the blade they were locking and as a result the pins SS pins LOST

I can go in its twin same age same place nothing happened

1970 Cal 29 Sea Fever

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

1981 J24 Tangent 2930
Tommays
Northport NY


If a dirty bottom slows you down what do you think it does to your boat
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
tommays is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
bottom paint blakeyoung Gear & Maintenance 7 05-02-2013 07:06 AM
Paint thinner for soft ablative bottom paint jameswilson29 Gear & Maintenance 7 11-26-2012 12:56 PM
Don Casey: Paint Waterline Stripe with Bottom Paint asdf38 Gear & Maintenance 21 05-29-2012 01:09 PM
Bottom paint prep, chipped paint josrulz Gear & Maintenance 16 02-14-2010 08:24 PM
Bottom paint on propeller? aphil138 Gear & Maintenance 17 01-09-2007 05:29 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome