In February of 2015, Roger Palmer gave a presentation at RVYC entitled "Electricity, Electrolysis, and Galvanic Corrosion".  The Main Lounge was packed for the event, as this proved to be a popular topic!  A comprehensive (43 pages) set of notes were published to accompany the lecture, but no video was made at the time.  Roger has now re-created the lecture (without a live audience), and posted it to YouTube.  The notes are still available, and the video includes information on how to download them.  Here is the video link: https://www.youtube.com/watch?v=t6Ge7_RTtJg&feature=youtu.be