I was wondering would it be a good idea to put zinc anodes on my corn planter to prevent rusting from dry fertilizer?? I know washing and keeping it clean is the best way to keep it clean but was wondering if they would help as well???
All silliness aside, its two completely different processes. Galvanic action is NOT corrosion and vice versa, corrosion is NOT galvanic activity. What you see in your planter is corrosion - your only defence is mechanical protection (paint or oil) or replacing the parts with more resistant material (stainless steel or plastic).