Environmental impact of Zinc/Magnesium Anodes - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 03-07-2013
Member
 
Join Date: Dec 2012
Location: Minnesota
Posts: 41
Thanks: 3
Thanked 0 Times in 0 Posts
Rep Power: 0
SolSailor is on a distinguished road
Environmental impact of Zinc/Magnesium Anodes

There was another thread dealing with choosing aluminum, zinc, or magnesium anodes for brackish waters. This same thread was discussed on another non-sailnet forum and the subject of using aluminum anodes came up because they supposedly have less of an "environmental impact". I had replied that I didn't see the concern since Zinc and Magnesium are naturally occurring elements.

After posting that, I realized that Mercury is also a naturally occurring element, but we don't want to start depositing it in our waterways.

So... did a quick search and forgive me if I missed it, but I couldn't seem to find anything on SailNet dealing with the potential for environmental impact of Zinc or Magnesium anodes on the environment. Does anyone out there know of any studies (not opinions) that show that these type of anodes can be detrimental to our waterways?
Reply With Quote Share with Facebook
  #2  
Old 03-07-2013
Bristol 45.5 - AiniA
 
Join Date: May 2006
Posts: 2,983
Thanks: 3
Thanked 44 Times in 39 Posts
Rep Power: 9
killarney_sailor is on a distinguished road
Re: Environmental impact of Zinc/Magnesium Anodes

I suspect that there may not be studies on this topic since the amount of zinc or magnesium ions released, even by a marina full of boats is quite small compared to what happened with tin-based anti-fouling paints 25 years ago. Trying to think back to my chem studies many years ago and I don't think these are particularly toxic metals. Could be wrong though.
__________________
Finished the circumnavigation in early February in Grenada. Have to work on a book project for the next several months so the boat will be waiting for next year.
Reply With Quote Share with Facebook
  #3  
Old 03-07-2013
pdqaltair's Avatar
Senior Member
 
Join Date: Nov 2008
Location: Deale, MD
Posts: 2,081
Thanks: 1
Thanked 23 Times in 23 Posts
Rep Power: 6
pdqaltair is on a distinguished road
Re: Environmental impact of Zinc/Magnesium Anodes

Actually zinc is quite toxic to marine life, right up there with copper. At 0.5 ppm everything dies. That is why it is used as a biocide in paints and it's part of why zincs stay clean. However, the area of zincs compared to boat bottoms is pretty small.
__________________
(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")

"Well, I just climb up to them."

by Joe Brown, English rock climber




To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #4  
Old 03-08-2013
tommays's Avatar
Senior Member
 
Join Date: Sep 2008
Posts: 4,212
Thanks: 1
Thanked 24 Times in 24 Posts
Rep Power: 6
tommays will become famous soon enough
Re: Environmental impact of Zinc/Magnesium Anodes

If you look you will find that urban runoff is the primary source of a bunch of things boats get hit for

automobile tires and various roofing materials are one of the primary sources of zink
__________________
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.
Reply With Quote Share with Facebook
  #5  
Old 03-08-2013
Senior Member
 
Join Date: Jan 2011
Posts: 666
Thanks: 0
Thanked 17 Times in 17 Posts
Rep Power: 4
Frogwatch is on a distinguished road
Re: Environmental impact of Zinc/Magnesium Anodes

This brings up Future Frogwatch experiment #37341. Coat props with zinc as both anti-fouling and corrosion protection. It is the use of a zinc that supresses a bronze prop from releasing Cu ions thus resulting in fouling of said prop. an un-zinced bronze prop will not foul much at all but may corrode.
Maybe hot dip Zn the props and spin them while the Zn is still liquid to prevent Zn drips.
However, my current prop is a plastic PerfectPitch.
Reply With Quote Share with Facebook
Reply

Tags
aluminum , anode , environment , magnesium , zinc


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Zinc Or Aluminum Anodes On Mid Chessie swampcreek Chesapeake Bay 24 09-11-2013 03:25 PM
damage after impact vamuscat Beneteau 22 03-02-2013 01:52 PM
Zinc Anodes johnseattle General Discussion (sailing related) 3 12-20-2009 11:24 PM
Zinc or aluminum anodes for my sailing area? josrulz Gear & Maintenance 5 02-09-2009 09:36 PM
Magnesium pencil in Aqua Marine Water Heater Alden44GER Gear & Maintenance 4 01-29-2009 01:06 PM


All times are GMT -4. The time now is 11:52 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012