Experience on offshore cathodic protection retrofitting in the northern South China Sea

作     者：L. Patterson A. Amorelli D. Condanni B. Bazzoni 

作者机构：CACT Operators GroupENI S.P.A.-Exploration & Production DivisionENI S.P.A.-Exploration & Production DivisionENI S.P.A.-Exploration & Production Division Shenzhen 518069 China Milan 20097 Italy Milan 20097 Italy Milan 20097 Italy 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2003年第22卷第4期

页      面：679-688页

核心收录：

学科分类：0710[理学-生物学] 081505[工学-港口、海岸及近海工程] 0908[农学-水产] 0707[理学-海洋科学] 08[工学] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 0814[工学-土木工程] 082401[工学-船舶与海洋结构物设计制造] 

主　　题：cathodic protection retrofitting offshore the South China Sea 

摘      要：Platforms I and II are steel structures located in offshore areas southeast of the Zhujiang (Pearl) River Delta, the northern South China Sea,. in about 110 in water depth. The jackets, with aluminum sacrificial anodes for cathodic protection (CP) of the immersed zone, were launched in March 1995. In May 096 a CP survey showed that, after almost one year of service, a low polarization level had been achieved and some extended unprotected zones existed; mainly in the deepest part of the Platform II. Further to this, a joint activity was decided in order to assess the need of a possible retrofitting of the CP systems. The results of the activity carried out are dealt with, including technical and economical comparisons amongst several retrofitting options, both with sacrificial anodes and with impressed current systems. The adopted solution is illustrated and data are reported on the level of protection presently achieved.