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引用本文:张经磊,马士德,侯保荣,韩敬愚,刘希斌,王春生.埕岛海区钢铁阴极保护参数研究.海洋与湖沼,1995,26(S1):59-65.
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埕岛海区钢铁阴极保护参数研究
张经磊1, 马士德1, 侯保荣1, 韩敬愚2, 刘希斌2, 王春生2
1.中国科学院海洋研究所 青岛 266071;2.石油天然气总公司胜利设计院 东营 257026
摘要:
于1989年9月开始,在山东省胜利油田胜利设计院化学研究室,对A3钢的保护参数进行研究。实验介质为现场采集的黄河入海口附近的含悬浮泥沙的新鲜海水。实验在动水(1.5m/s),静水和动静水交替三种模拟状态下进行。控制保护电位为-800,-900,-1000mV(Ag/AgCl),研究在上述状态下和不同电位下的保护度,最大冲击保护电流密度及稳定的保护电流密度。结果表明,在三种保护电位下,A3钢的保护度都在90%以上,可以达到防腐目的。在不同的模拟状态下,保护电流密度变化较大,其稳定值在动水状态下为2000-2500 mA/m2,在静水状态下为85 – 120 mA/m2,在动静水交替下为70 - 400 mA/m2。最大冲击保护电流密度(动水状态,保护电位为-1000 mV)接近30 A/m2
关键词:  阴极保护  保护参数  泥沙海水
DOI:
分类号:
基金项目:中国科学院“八五”重大、重点资助!KY85-11-5;胜利油田资助
附件
STUDIES ON CATHODIC PROTECTION PARAMETER IN CHENGDAO SEA
Zhang Jinglei1, Ma Shide1, Hou Baorong1, Han Jingyu2, Liu Xibin2, Wang Chunsheng2
1.Institute of Oceanology, Academia Sinica, Qingdao 266071;2.Shengli Design Institute, CNPC, Dongying 257026
Abstract:
The Chengdao Sea zone located near the Huanghe River Mouth is characterized by high current `velocity (max. 1.5 m/s) and high silt content (max. 0.93 kg/m3 in the surfacial water, 1.24 kg/m2 in the bottom water). The cathodic protection design parameter under these conditions may be different from that used in common practice. To design a cathodic protection system for marine oil platform, wharf steel pile, steel pipeline etc. in this sea zone, the cathodic protection current density was studied under stir, stirless, and alternate stir-stirless conditions and three potentials; -800, -900, -1000 mV (Ag/AgC1) in laboratory with fresh silt seawater taken from the sea zone. The results show that the protection rates are all over 90% under the above three conditions and potentials,' good enough for anti-corrosion. In different condition, the protection current densities varied considerably, being 2000 - 2500 mA/m2, 85 - 120 mA/m2, and 70 - 400 mA/m2 under stir, stirless, and alternate stir-stirless conditions when potential were between -800 and -1000 mV.
Key words:  Cathodic protection, Protection parameter, Silt seawater
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