Mercury - Magnesium Anode Plate V6, V8 & V10 Series Magnesium Anti-Corrosion Plate 8M0200103. Overview. If you've spent any time on the water, you know how much trust we put in our engines. Whether you're running wide across a glassy lake at dawn or easing the boat back onto the trailer at sunset, you want the reassurance that every part of your motor is protected. Corrosion is one of those quiet threats - it doesn't show up all at once, but over time it can eat away at performance and reliabili