pair of waterjets in the stern of a coastguard docked in drydock.

action alloy aluminum and anode anodes anodic boat cathodic catodic cell coastguard corrosion docked drydock electrochemical electrolyte electropotential fast for galvanic group hull iron jet magnesium maintenance metal oxidation pair potential protection pump reaction repair repairs resistivity sacrificial ship shipyard steel stern structure surface varadero vessel water waterjet waterjets worker zinc