Add to Cart Quick view Sea Star Solutions Anode - Sierra Marine Engine Parts - 18-6045 (118-6045) Sea Star Solutions MSRP: $15.75 Now: $14.28 Was: A zinc anode is a sacrificial anode used to prevent corrosion in cathodic protection systems. It's also a galvanic anode, comparable to the aluminum or magnesium galvanic anodes. A zinc anode's... MD18-6045