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A first principle mathematical model has been used to study the effects of ocean environment and cathodic protection on the formation of calcareous deposits and their ability to reduce the cathodic urrent density. These parameters include applied potential, rotation speed, temperature, salinity, and depth. The results showed the applied potential strongly influences the formation of calcareous deposits and their ability to reduce the cathodic current density. Among the environmental f ctors, rotation speed has the most influence on the cathodic urrent density. Salinity slightly influences the cathodic urrent density over the range of interest. Temperature is much more influential than salinity on the ability of calcareous deposits to reduce the cathodic urrent density. The results from modeling showed the formation rate of calcareous deposits is much lower at 5 ~ than at room temperature. The depth is very critical not only to cathodic urrent density but also to the formation of calcareous deposits in seawater. The formation of calcareous deposits would be expected to be slower and the deposits would contain more Mg(OH)2 in deep water. In the first part of this research, a first principles mathe-matical model was presented for the formation of cal-careous deposits on cathodically protected steel in seawa-ter. 1 This model and the main results of the. model will be
Yan et al. (Sat,) studied this question.