Abstract
ABSTRACT New sacrificial anode protection criteria that were developed and tested by the Dubai Petroleum Company (DPC) have resulted in a 40 percent decrease in anode weight as compared to that required by conventionally accepted design. Derivation of the criteria are based on an analyses of extensive field results of potential surveys of seven DPC platforms that had conventional sacrificial anode protection systems. It was found that an initial platform current density of 310±20 milliampers per square meter of area exposed to seawater, resulted in polarization of the platform to −1 volt with respect to the silversilver chloride reference electrode. As a consequence of this high initial polarization, the electric current requirement for protection is significantly reduced. The new criteria were used in the design of Platform "JJ" which was installed in September 1982. Field results that include periodic potential surveys of Platform "JJ" will be presented and discussed.
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