Results for a mixed cathodic protection (CP) method comprising a galva
nic system using sacrificial zinc anodes and an impressed current syst
em, tested for 1 year on four corvette-type ships, are described. The
naval vessels had been in service for approximate to 15 years prior to
performing this evaluation. CP may be economically optimized using a
low impressed current system, and by placing sacrificial anodes on the
ships' hulls.