In message <[EMAIL PROTECTED]>, Tony Brooks <[EMAIL PROTECTED]> writes > >What we really need now is a chemist to tell us a simple test to >differentiate between zinc, aluminium and magnesium.
Sorry, you'll have to make do with a physicist. The PD between the surface of the anode and the steel of the hull should tell you the identity of the metal well enough to identify the gross composition. If I had a table of electronegativities handy I might be able to help more. Perhaps an electrochemist will turn up.... Wassail!! -- Martin E Phillips http://www.g4cio.demon.co.uk Homebrewing, black pudding, boats, morris dancing, ham radio and more! The Gloucester-Sharpness canal web page http://www.glos-sharpness.org.uk
