| Discussion on Cathodic Protection of HZ 21-1 Platform |
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| 作者单位： | Chen Lisheng Engineer，Nanhai East Oil Corporation. CNOOC，510240 Guangzhou |
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| 摘 要： | The environmental conditions around the first offshore HZ 21- 1 steel wellhead platform in the South China Sea are characterized by deep water, frequent typhoons, rough waves, high water temperature, severely corrosive seawater, and thick fouling organism attachments. The design and effectiveness of galvanic anode protection system are presented, and several methods are described, which are the calculation method of the protective current density considering the variation of water depth, the method of determining protection parameters considering various factors, the arrangement of anodes based on potential distribution and current requirements at different water depths, and the method of anode installation. Finally the effect of the accuracy of selected cathodic protection parameters on the economic benefits of offshore projects is also discussed..
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Discussion on Cathodic Protection of HZ 21-1 Platform |
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| Authors: | Chen Lisheng Engineer Nanhai East Oil Corporation CNOOC Guangzhou |
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| Institution: | Chen Lisheng Engineer,Nanhai East Oil Corporation. CNOOC,510240 Guangzhou |
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| Abstract: | The environmental conditions around the first offshore HZ 21- 1 steel wellhead platform in the South China Sea are characterized by deep water, frequent typhoons, rough waves, high water temperature, severely corrosive seawater, and thick fouling organism attachments. The design and effectiveness of galvanic anode protection system are presented, and several methods are described, which are the calculation method of the protective current density considering the variation of water depth, the method of determining protection parameters considering various factors, the arrangement of anodes based on potential distribution and current requirements at different water depths, and the method of anode installation. Finally the effect of the accuracy of selected cathodic protection parameters on the economic benefits of offshore projects is also discussed.. |
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| Keywords: | offshore platform seawater corrosion cathodic protection galvanic anode protective current density |
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