anodes

[Grehan]

We're in Gib, but our friends have a steel De Groot that together we're going to take up to France (by road) and put into fresh water. He's got a complete set (20+) of unused salt-water anodes and is wondering how effective they would be in fresh. A complete set is quite expensive and if the salt jobbies would be (say) 70% effective then we'd probably fit them and haul out and check 'em in 6 or 9 months time.
Sorry, I know France isn't the Thames, but I thought some of you chaps might have some sensible opinions. Thanks in advance.

 

[byron]

Fresh water isn't as active as salt water furthermore if in an area where there is lack of current i.e. a marina or canal this reduces the electrolysis even further.
Now! I am speaking from experience and not from technical know-how but I can tell you that on all my boats I used salt water anodes not fresh water ones. My boats spent roughly June-September on salt or semi-saline and the rest of the Thames. I never experienced a moment's trouble.
If others more technical than I have a different view than far be it for me to argue.