BS EN 16222:2012

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Competence of personnel
5 Design basis
6 Impressed current system
7 Galvanic anodes system
8 Commissioning, Operation and
   Maintenance
9 The protection of ships' hulls during fitting out
   and when laid up
10 Documentation
Annex A (informative) - Impressed current system for hulls
        of ships based on two cathodic protection zones
Annex B (informative) - Guidance on design current values
        for cathodic protection of hulls of ships
Annex C (informative) - Anode resistance, current and life
        duration formulae
Annex D (informative) - Electrical bonding systems
Annex E (informative) - Monitoring of electrical bonding of a
        ship's propeller
Annex F (informative) - Impressed current system for ships
        based on an aft (stern) system only
Annex G (informative) - Location of galvanic anodes in the
        stern area
Annex H (informative) - Electrochemical characteristics of
        impressed current anodes
Annex I (informative) - Cofferdam arrangements
Annex J (informative) - Cathodic protection of a moored ship
        using suspended galvanic anodes
Bibliography

Specifies the general criteria and recommendations for cathodic protection of immersed external ship hulls and appurtenances.

1.1 General This European Standard defines the general criteria and recommendations for cathodic protection of immersed external ship hulls and appurtenances. This European Standard does not cover safety and environmental protection aspects associated with cathodic protection. Relevant national or international regulations and classification society requirements apply. 1.2 Structures This European Standard covers the cathodic protection of the underwater hulls of ships, boats and other self propelled floating vessels generally used in seawater together with their appurtenances such as rudders, propellers, shafts and stabilisers. It also covers the cathodic protection of thrusters, sea chests and water intakes (up to the first valve). It does not cover the protection of internal surfaces such as ballast tanks. It does not cover steel offshore floating structures which are covered in EN 13173. 1.3 Materials This European Standard covers the cathodic protection of ship hulls fabricated principally from carbon manganese steels including appurtenances of other ferrous or non-ferrous alloys such as stainless steels and copper alloys, etc. This European Standard applies to both coated and bare hulls; most hulls are coated. The cathodic protection system should be designed to ensure that there is a complete control over any galvanic coupling. This European Standard does not cover the cathodic protection of hulls principally made of other materials such as aluminium alloys, stainless steels or concrete. 1.4 Environment This European Standard is applicable to the hull and appurtenances in seawater and all waters which could be found during a ship’s world-wide deployment.