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kasimira
kasimira

Posted: Thu Apr 26, 2012 6:15pm

Post Subject: SACRIFICIAL ANODES

Dear Tony, Andrew Edwards, in his article, 'Designing your first boat' in the May edition of Canal Boat wrote that, "some surveyors are now recommending eight to ten anodes on second hand boats." As my two year old motor barge is coming up for its first re-blacking (two-pack epoxy) I would appreciate your advice in respect of where they should be fitted to give maximum protection, and yet will not be prone to being physically damaged during cruising. Also, is it possible to fit an anode to protect the bow thruster tube?

Tony-B
Tony-B

Posted: Fri Apr 27, 2012 8:40am

Post Subject: SACRIFICIAL ANODES

First of all have a look at this website and take note of what they say http://www.mgduff.co.uk/mgduff-product-catalog. You can fit anodes to a steel tube as long as the welder can get his "gun" and hands into the tube. You will not be able to fit one to a GRP tube. The area of influence of an anode is limited (hence the website link) so many boats are not fully protected. Those that do have "mid hull" anodes often are flat bottomed and keep the anode profile within the wear edge overhang of the bottom plate or have recesses formed into the hull. If your boat has chines they might offer some, but not complete, protection from damage. Tony Brooks

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