Position: Home > Articles > STUDY FOR CALCAREOUS DEPOSITS UNDER INITIAL CP IN LOW TEMPERATURE AND LOW DISSOLVED OXYGEN CONTENT IN DYNAMIC SEAWATER
Transactions of Oceanology and Limnology
2011
(2)
137-141
低温低溶解氧流动海水中阴极保护初期钙质层的形成
作 者：
曹振宇;宋积文;杜敏
单 位：
中海油能源发展股份有限公司北京分公司;中国海洋大学化学化工学院海洋化学理论与工程技术教育部重点实验室
关键词：
钙质层;低温;低溶解氧;阴极保护;恒流极化
摘 要：
采用恒电流极化、线性极化和表面分析技术研究了Q235钢在低温低溶解氧流动海水中阴极保护初期钙质层的形成情况。结果表明,在低温低氧流动条件下150～800mA/m~2极化电流密度都可以达到Q235钢的最低保护电位,但钙质层难以形成,要得到致密良好的钙质层需要在阴极保护初期提高极化电流密度。低温低氧条件下钙质层的主要成分是CaCO_3,Mg(OH)_2形成不明显。
译 名：
STUDY FOR CALCAREOUS DEPOSITS UNDER INITIAL CP IN LOW TEMPERATURE AND LOW DISSOLVED OXYGEN CONTENT IN DYNAMIC SEAWATER
作 者：
CAO Zhenyu~1,SONG Jiwen~2,and DU Min~1 (1.Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education, College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China;2.Beijing Branch,CNOOC Energy Technology & Services Limited Beijing 100010,China)
关键词：
calcareous deposit;;low temperature;;low dissolved oxygen content;;cathodic protection;;galvanostatic control
摘 要：
Calcareous deposits of Q235 steel under initial CP in low temperature and low dissolved oxygen content in dynamic seawater was studied using galvanostatic control,liner polarization resistance and surface analysis techniques.The results showed that it could achieve the lowest protection potential when current density was 150mA/m2 to 800mA/m~2,but the calcareous deposits formed difficulty,higher polarization current density was needed to obtain the compact nicer calcareous deposits.Under the low temperature and low dissolved oxygen content environment,the pricipal calcareous layer constituent is CaCO_3,Mg(OH)_2 and does not form obviously.
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