| 动态海水中保护电位对钙质沉积层形成的影响 |
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| 引用本文： | 李成杰,杜敏,李妍,张国庆,张艳芳.动态海水中保护电位对钙质沉积层形成的影响[J].中国海洋大学学报(自然科学版),2011(Z2):149-153. |
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| 作者姓名： | 李成杰 杜敏 李妍 张国庆 张艳芳 |
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| 作者单位： | 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;海洋石油工程股份有限公司设计公司; |
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| 基金项目： | 国家科技重大专项(2008ZX05056-03-05)资助 |
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| 摘 要： | 采用恒电位阴极极化和线性极化法研究了天然海水中不同动态条件、不同初始保护电位下,阴极保护初期碳钢表面钙质沉积层的形成规律。扫描电镜(SEM)和能谱X-射线分析(EDX)分析了保护后碳钢表面的产物。结果表明:-800 mV(vs.SCE,下同)保护电位下,在静态和动态海水中碳钢表面形成的钙质沉积层质量都较差;-900 mV保护电位下,静态海水中形成致密的钙质沉积层,动态下钙质沉积层形成困难;-1 000 mV保护电位下,静态和动态海水中都形成良好的钙质沉积层。随流速增大,阴极保护电流密度显著增大,钙质沉积层中Ca/Mg比值增加;动态条件下,较负的保护电位,有利于阴极保护初期钙质沉积层的形成。
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| 关 键 词： | 阴极保护 保护电位 动态海水 钙质沉积层 |
The Influences of Protection Potentials on the Formation of Calcareous Deposits in Dynamic Seawater |
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| LI Cheng-Jie,DU Min,LI Yan,ZHANG Guo-Qing,ZHANG Yan-Fang.The Influences of Protection Potentials on the Formation of Calcareous Deposits in Dynamic Seawater[J].Periodical of Ocean University of China,2011(Z2):149-153. |
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| Authors: | LI Cheng-Jie DU Min LI Yan ZHANG Guo-Qing ZHANG Yan-Fang |
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| Institution: | LI Cheng-Jie1,DU Min1,LI Yan2,ZHANG Guo-Qing2,ZHANG Yan-Fang2(1.The 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.China offshore Oil Engineering Co.,Ltd Engineering Company,Tianjin 300451,China) |
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| Abstract: | Potentiostatic cathodic polarization and linear polarization were used to study the formation of calcareous deposits on the carbon steel in the initial period of cathodic protection in the natural seawater under the different dynamic conditions and the different protection potentials.Scanning electric microscope(SEM) and energy dispersive x-ray(EDX) were used to analyse the products on the carbon steel surface after polarization.The results showed that the calcareous deposits formed on the carbon steel surf... |
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| Keywords: | cathodic protection protection potential dynamic seawater calcareous deposits |
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