Research and Development of Cathodic Protection for Steels in Deep Seawater

The influences of dissolved oxygen,temperature,pH,carbonate and pressure in deep seawater on the cathodic protection of steel materials and the formation of calcareous deposits were reviewed.Meanwhile,overseas and domestic research status on the cathodic protection for steel materials in deep seawater was summarized.Furthermore,the parameters of the deep seawater cathodic protection design were introduced.It was proposed that it was an important measure to increase the initial current density for deep seawater cathodic protection and also with the coating. Finally,the inadequacies of the research currently on the deep seawater cathodic protection and the development direction were discussed.