With reference to Marine Growth Prevention Systems, which incorporate impressed current anodes fitted in the sea boxes or sea strainers of main seawater cooling water systems: (a) explain how the system protects steel pipework against marine growth and corrosion; (6) (b) explain how the effectiveness of the system can be ascertained; (2) (c) state the advantages this system has over one which makes use of biocides. (2)
Hull protection
UKM Tuticorin 
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