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PRACTICAL CATHODIC PROTECTION PARAMETERS
RESISTIVITY AND ELECTRODE RESISTANCE
8 other sections not shown
achieve protection aluminium ampere hours anode and cathode anode metal anode resistance anode system backfill ballast tank buried cable cathode leads cathodic protection cause cent circuit resistance coating consumable anodes consumption corrosion cell corrosion product cost current density current density required current flowing current output current required curve decrease diameter distance driving voltage effect electrical connection electrode electrolyte engineering galvanized graphite groundbed high resistivity hull impressed current impressed current system increase insulated ions jetty lead alloy anodes length low resistivity magnesium anodes metal potential method mounted negative occur overprotection paint piles pipe metal pipeline plate polarization polarization curve Potential variation potentiometer protection current Q cm reduced relative required for protection resistor sacrificial anodes salt bridge sea water ship shown in Figure silver chloride spread of protection steel structure sulphate half cell surface swing techniques temperature tube usually vary voltmeter zinc anodes