-- The Home Page of the Finishing Industry
23+ years of serious education, promoting Aloha,
& the most fun you can have in metal finishing smiley
    no popups, no spam
on this site
current topics
topic 8390

Zinc Anodes in Fresh and Sea Water


I've got a question !

I own a 32' fibreglass sailing boat and have a zinc anode fitted to the prop shaft. The boat is kept in a marina which is gradually being turned to fresh water (as part of a barrage scheme in S Wales (UK)). I then sail the boat in seawater and I'm told that my anode will not perform properly in fresh water. I am also told that I should get a freshwater anode (never heard of one though) to combat the problem but that I should expect this to sacrifice very quickly in seawater.

In this right ? - Any advice


Ken Pugh
- Panarth, UK


We are producers of zinc, aluminium and magnesium anodes. Zinc will not work in fresh water it is purely for salt water. Magnesium is the simple answer to your problem with fresh water, although magnesium needs to be removed when going into salt water for long periods. Therefore if you connect magnesium anode to a length of conductive wire and made a crocodile clamped connection to what your trying to protect and simply leave your zinc anode on and connect the magnesium to the shaft whilst your in fresh water.

Peter Foster
- Kent, England

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.