Impressed Current Cathodic Protection
Abbreviation: ICCP
Active corrosion protection injecting low-voltage DC into the hull via inert anodes; used on most large vessels.
In practice
ETO monitors the system: anode current, reference-electrode potentials. Drydock inspections include IR-camera survey of the anodes.
Regulatory detail & full definition
Impressed Current Cathodic Protection — active corrosion-control system injecting low-voltage DC current into the hull through inert anodes (typically platinum-coated titanium or mixed metal oxide) mounted on the underwater hull. Reference electrodes monitor hull-to-water potential and the system controller adjusts current to maintain potential in the protective range (typically -0.85 to -1.1 V vs Ag/AgCl). ISO 20313:2018 covers ICCP design and operation. ICCP is used on most large commercial vessels, often supplemented by sacrificial anodes in shielded areas where current flow is poor.
Authoritative source: ISO 20313 (cathodic protection) ↗
Related
Source: ISO 20313:2018
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